Certain probiotics appear to enhance innate immunity by improving phagocytosis and natural killer cell activity, though they have a less pronounced effect on acquired immunity. Recent reviews show probiotics can enhance antibody responses to influenza vaccines in adults by using lactobacilli or bifidobacteria. Probiotics play a crucial role in antiviral immunity by modulating host immune responses, including activating NK cells, balancing Th1/Th2 responses, and inducing antibody production.
This document provides an introduction to microbiology. It defines microbiology as the study of microorganisms like bacteria, fungi, algae, protozoa and viruses. These microorganisms are too small to be seen with the naked eye and are present everywhere in the environment and in and on humans and other animals. Microorganisms can be beneficial or harmful. The document then outlines the main branches of microbiology like bacteriology, mycology, and parasitology. It also discusses several applied branches like medical microbiology, pharmaceutical microbiology, and food microbiology. Finally, it reviews some important figures in the history of microbiology like Louis Pasteur, Robert Koch, Joseph Lister and their contributions to the field
This document provides an overview of microbiology and microorganisms. It discusses that microbiology is the study of microbes too small to be seen with the naked eye. Microbes play both harmful and beneficial roles in our lives, causing diseases but also enabling important processes like photosynthesis, decomposition, nitrogen fixation, and food production. The document examines how microbes are used in medicine and research, gives examples of human and plant diseases caused by microbes, and explores microbial diversity and symbiotic relationships between microbes and other organisms.
Bacterial Toxins
endotoxin
exotoxinO- antigen , core polysaccharide and lipid A.
Properties of bacterial endotoxin Properties of bacterial exotoxin Toxoid Types of exotoxins
A-B toxin
Super-antigen
Membrain disrupting
How Our Body Eliminates Toxins
Microbiology is the study of microorganisms that are too small to be seen with the naked eye, including bacteria, fungi, and protozoa. These microbes play key roles in processes like soil formation, nutrient cycling, and were the only life forms on Earth for billions of years. There are several branches of microbiology focused on different types of microbes. Important figures like van Leeuwenhoek, Pasteur, Koch, and others helped develop microbiology and establish concepts like the germ theory of disease. Microbiology now informs diverse fields like medicine, biotechnology, and more.
Mechanism of pathogenicity-Exotoxin and endotoxinaiswarya thomas
Brief description on mechanisms of pathogenicity, actions of toxins produced by various bacteria and notable endotoxins and exotoxins. Mechanism of action of some of the commonest endotoxins and exotoxins are explained.
Antibiotics are drugs derived from microorganisms that are used to treat bacterial infections by killing or stopping the growth of bacteria. Alexander Fleming discovered penicillin in 1928 when he observed that a mold that had contaminated a culture plate was releasing a substance that was killing the surrounding bacteria. Penicillin was the first widely used antibiotic and revolutionized medicine, but bacteria have increasingly developed resistance requiring new antibiotics to be discovered and developed.
The Significance and Practical Applications of MICROBIOLOGY in Relation to BI...Regie Panganiban
Microorganisms play important roles in addressing climate change, pollution, and pandemics. They help remove carbon from the air, degrade air and water pollutants through biofilm formation, and assist in vaccine development. Microbes also critically impact human health and survival through roles in the digestive system, on the skin, and in maintaining a diverse gut microbiome. While microbiology provides benefits, its principles and technologies could be exploited to cause harm if water treatment is inadequate or pathogenic microbes are released.
This document provides an overview of microbiology topics relevant to nursing. It discusses the classification of microorganisms including bacteria, viruses, protozoa, fungi, worms, and arthropods. For each type of microbe, details are given about their structure, effects on humans as pathogens or normal flora, and examples of significant diseases. Methods for controlling microbes like sterilization and antibiotics are also reviewed. Public health measures to prevent spread of infection through food, water, and hygiene are outlined.
This document provides an introduction to microbiology. It defines microbiology as the study of microorganisms like bacteria, fungi, algae, protozoa and viruses. These microorganisms are too small to be seen with the naked eye and are present everywhere in the environment and in and on humans and other animals. Microorganisms can be beneficial or harmful. The document then outlines the main branches of microbiology like bacteriology, mycology, and parasitology. It also discusses several applied branches like medical microbiology, pharmaceutical microbiology, and food microbiology. Finally, it reviews some important figures in the history of microbiology like Louis Pasteur, Robert Koch, Joseph Lister and their contributions to the field
This document provides an overview of microbiology and microorganisms. It discusses that microbiology is the study of microbes too small to be seen with the naked eye. Microbes play both harmful and beneficial roles in our lives, causing diseases but also enabling important processes like photosynthesis, decomposition, nitrogen fixation, and food production. The document examines how microbes are used in medicine and research, gives examples of human and plant diseases caused by microbes, and explores microbial diversity and symbiotic relationships between microbes and other organisms.
Bacterial Toxins
endotoxin
exotoxinO- antigen , core polysaccharide and lipid A.
Properties of bacterial endotoxin Properties of bacterial exotoxin Toxoid Types of exotoxins
A-B toxin
Super-antigen
Membrain disrupting
How Our Body Eliminates Toxins
Microbiology is the study of microorganisms that are too small to be seen with the naked eye, including bacteria, fungi, and protozoa. These microbes play key roles in processes like soil formation, nutrient cycling, and were the only life forms on Earth for billions of years. There are several branches of microbiology focused on different types of microbes. Important figures like van Leeuwenhoek, Pasteur, Koch, and others helped develop microbiology and establish concepts like the germ theory of disease. Microbiology now informs diverse fields like medicine, biotechnology, and more.
Mechanism of pathogenicity-Exotoxin and endotoxinaiswarya thomas
Brief description on mechanisms of pathogenicity, actions of toxins produced by various bacteria and notable endotoxins and exotoxins. Mechanism of action of some of the commonest endotoxins and exotoxins are explained.
Antibiotics are drugs derived from microorganisms that are used to treat bacterial infections by killing or stopping the growth of bacteria. Alexander Fleming discovered penicillin in 1928 when he observed that a mold that had contaminated a culture plate was releasing a substance that was killing the surrounding bacteria. Penicillin was the first widely used antibiotic and revolutionized medicine, but bacteria have increasingly developed resistance requiring new antibiotics to be discovered and developed.
The Significance and Practical Applications of MICROBIOLOGY in Relation to BI...Regie Panganiban
Microorganisms play important roles in addressing climate change, pollution, and pandemics. They help remove carbon from the air, degrade air and water pollutants through biofilm formation, and assist in vaccine development. Microbes also critically impact human health and survival through roles in the digestive system, on the skin, and in maintaining a diverse gut microbiome. While microbiology provides benefits, its principles and technologies could be exploited to cause harm if water treatment is inadequate or pathogenic microbes are released.
This document provides an overview of microbiology topics relevant to nursing. It discusses the classification of microorganisms including bacteria, viruses, protozoa, fungi, worms, and arthropods. For each type of microbe, details are given about their structure, effects on humans as pathogens or normal flora, and examples of significant diseases. Methods for controlling microbes like sterilization and antibiotics are also reviewed. Public health measures to prevent spread of infection through food, water, and hygiene are outlined.
This document provides an overview of microbiology as a field of study. It discusses the scope of microbiology, the major groups of microorganisms including bacteria, viruses, and fungi. It also outlines some of the key branches and emerging areas within microbiology like biotechnology, public health, and geomicrobiology. Additionally, it covers the historical foundations of microbiology including the early development of microscopy and contributions from scientists like Van Leeuwenhoek, Pasteur, Koch and others that helped establish microbiology as a scientific discipline.
1) Pathogenesis is the development of a disease caused by an infectious agent like a microbe. It involves the microbe overpowering the host's defenses through steps like transmission, colonization, adhesion, invasion, survival, and tissue injury.
2) Microbes have various mechanisms that allow them to cause disease, including producing toxins or enzymes that damage tissues or avoid host defenses. They may also form protective capsules or adhere tightly to host cells.
3) The degree of pathogenicity or ability to cause disease depends on factors like infectious dose, routes of transmission, and virulence factors that help microbes overcome host defenses.
Microbiology is the study of microorganisms that are too small to be seen with the naked eye, such as bacteria, fungi, protozoa, algae, and viruses. Microbes play both beneficial and pathogenic roles. The history of microbiology began in the 17th century with the first observations of microbes using microscopes. Important figures who contributed to the field include Anton van Leeuwenhoek, Louis Pasteur, Robert Koch, Edward Jenner, Alexander Fleming. Their work established germ theory, microbial fermentation and disease causation, vaccination, and the discovery of the first antibiotic - penicillin.
This document contains lecture notes on clinical immunology from Walter Wakhunu Waswa of North Coast Medical Training College. It covers various topics including:
- Classification of the immune response into innate and acquired systems.
- Types of hypersensitivity reactions including anaphylaxis, urticaria, hay fever, and asthma.
- Autoimmune diseases where the immune system attacks the body's own tissues, listing various conditions.
- Immunization methods including active immunization through vaccination and passive immunization through antibody transfer.
This document discusses the history and scope of microbiology. It begins by defining microbiology as the study of microorganisms, which are tiny creatures that can only be seen under a microscope. It then describes the branches of microbiology, including pure microbiology which focuses on taxonomy and integration of microbes, and applied microbiology which examines medical, veterinary, industrial, and other applications. The document continues by outlining the major groups of microorganisms and how they are named and classified. It concludes with an overview of the key discoveries and scientists that helped establish microbiology as a field, including the germ theory of disease and development of antibiotics.
Microbiology is the study of organisms that are usually too small to be seen by the unaided eye; it employs techniques—such as sterilization and the use of culture media—that are required to isolate and grow these microorganisms.
This document summarizes key concepts from a medical microbiology lecture, including definitions of infection, pathogens, commensals, and nonpathogens. It discusses the roles of normal flora in protecting the host and how their composition is determined. It also outlines colonization, carriage states, pathogenicity, and virulence factors. Specific examples are provided of bacterial adherence mechanisms like pili and adhesins in E. coli and S. aureus. The document also briefly discusses bacterial growth requirements, iron acquisition, and toxin production.
Mechanism of bacterial pathogenesis and virulenceMeher Rizvi
This document discusses bacterial virulence factors and mechanisms of pathogenesis. It defines key terms like pathogens, opportunistic pathogens, virulence, and colonization. It then describes several virulence factors like adhesins, pili, capsules, toxins, enzymes, and plasmids that allow bacteria to adhere to and invade host cells, evade the immune system, and cause damage. Methods of acquiring new virulence genes like plasmids, bacteriophages, and horizontal gene transfer are also summarized.
The document provides an overview of immune response properties and mechanisms. It discusses:
1) Innate immunity, which is non-specific and provides immediate defense mechanisms like anatomical barriers and phagocytosis.
2) Adaptive immunity, which is acquired and provides long-lasting, targeted defenses through humoral immunity using antibodies and cell-mediated immunity using T cells.
3) Key properties of adaptive immunity include specificity, diversity, and memory, allowing a tailored response to a wide range of pathogens.
The document discusses the body's defense systems against microbial infections. It describes the non-specific defenses provided by the normal microbiota and barriers like skin and mucus. These constitute the first line of defense. The second line involves immune cells like neutrophils and macrophages that respond to infections. The third and most specific line is the immune system consisting of B and T cells that provide long-lasting adaptive immunity.
Bacterial toxins and toxoids are discussed. Endotoxins are part of the cell wall of gram-negative bacteria and are released upon cell lysis. Exotoxins are secreted by bacteria and can have potent toxicity. Toxoids are modified exotoxins that have had their toxicity destroyed but retain antigenicity, allowing them to be used safely in vaccines. The production of tetanus toxoid involves growing Clostridium tetani bacteria, lysing the cells, purifying and concentrating the exotoxins, inactivating them with formaldehyde to create a toxoid, and formulating the vaccine product.
This document provides information on bacterial pathogenesis and virulence factors. It begins with definitions of key terms like pathogens, pathogenicity, virulence, and opportunistic pathogens. It then discusses the difference between infection and disease. Koch's postulates for establishing causation are outlined. The document explores factors that influence pathogenicity like virulence factors, number of initial organisms, and immune status of the host. Several virulence factors are described in detail, including toxins, invasiveness through adhesion and penetration of tissues, capsules that aid evading phagocytosis, siderophores for competing with the host for iron, and enzymes that can aid spreading or hydrolyze immunoglobulins.
The document discusses innate and acquired immunity. It defines innate immunity as genetic and non-specific, providing the body's first line of defense against infection through physical barriers, biochemical factors, cells, and genetics. Acquired immunity develops from exposure to antigens and involves lymphocytes and antibody production, resulting in long-lasting immunity through immunological memory. The document also distinguishes between natural and artificial active immunity, as well as natural and artificial passive immunity.
in fundamentals of plant pathology we should know about the history plant pathology. and what are land marks in the development plant pathology in history from ancient period to modern period. in this presentation we are discussing about the history plant pathology
This document summarizes bacterial toxins. It describes two main types - endotoxins and exotoxins. Endotoxins are lipopolysaccharides associated with the cell walls of gram-negative bacteria. They are heat-stable and can cause fever, shock, and death. Exotoxins are heat-labile protein toxins secreted by bacteria, including diphtheria toxin, staphylococcal enterotoxins, and streptococcal toxins. Many exotoxins have an A/B subunit structure and act intracellularly through enzymatic activity. They can cause illnesses like toxic shock syndrome. Bacterial toxins are major virulence factors that damage host cells through various mechanisms.
This document discusses bacterial pathogenesis and infection. It covers several key topics:
1) Normal flora are microorganisms that normally live in or on the human body without causing disease. Opportunistic pathogens are normal flora that can cause disease under certain conditions if the host's immunity is compromised.
2) Bacterial infection is determined by factors of both the bacterium and host. The number and virulence of bacteria as well as the host's innate and acquired immunity impact whether infection occurs.
3) Bacterial pathogenicity is influenced by virulence factors like toxins, invasiveness, and the portal of entry. Virulence refers to an organism's ability to cause disease and is determined by its inv
Plant pathology is the study of plant diseases. It deals with the causes and mechanisms of disease development, plant-pathogen interactions, and disease management methods. Some key events in the history of plant pathology include the first use of microscopy to observe fungi and bacteria in the 16th-17th centuries, the 19th century discoveries of the fungal causes of late blight and anthrax, and the early 20th century discoveries of viral and other non-fungal pathogens. Modern plant pathology incorporates genetics, microbiology, and other fields to understand and address important diseases.
Girija Bhavesh Bhanushali is a student pursuing her SYB Pharm degree at an unspecified college in 2022-2023. This document provides an introduction and overview of microbiology. It discusses the history of microbiology from early observers like Aristotle and Antonie Van Leeuwenhoek to modern founders like Louis Pasteur and Robert Koch. The document also outlines major branches of microbiology and highlights the important scope and roles of microbiology in fields like medicine, pharmaceuticals, food science, and more. It emphasizes how microbiology is crucial to health, disease treatment, vaccine development, and other areas of daily life.
The document provides an overview of the history and development of medicinal chemistry. It discusses how medicinal chemistry originated from the isolation of medicinal agents found in plants by early scientists. The field has since expanded to include the creation of new synthetic drug compounds through the application of chemical research techniques. Medicinal chemists work to synthesize and improve new pharmaceuticals in collaboration with other scientists.
This document provides an overview of microbiology as a field of study. It discusses the scope of microbiology, the major groups of microorganisms including bacteria, viruses, and fungi. It also outlines some of the key branches and emerging areas within microbiology like biotechnology, public health, and geomicrobiology. Additionally, it covers the historical foundations of microbiology including the early development of microscopy and contributions from scientists like Van Leeuwenhoek, Pasteur, Koch and others that helped establish microbiology as a scientific discipline.
1) Pathogenesis is the development of a disease caused by an infectious agent like a microbe. It involves the microbe overpowering the host's defenses through steps like transmission, colonization, adhesion, invasion, survival, and tissue injury.
2) Microbes have various mechanisms that allow them to cause disease, including producing toxins or enzymes that damage tissues or avoid host defenses. They may also form protective capsules or adhere tightly to host cells.
3) The degree of pathogenicity or ability to cause disease depends on factors like infectious dose, routes of transmission, and virulence factors that help microbes overcome host defenses.
Microbiology is the study of microorganisms that are too small to be seen with the naked eye, such as bacteria, fungi, protozoa, algae, and viruses. Microbes play both beneficial and pathogenic roles. The history of microbiology began in the 17th century with the first observations of microbes using microscopes. Important figures who contributed to the field include Anton van Leeuwenhoek, Louis Pasteur, Robert Koch, Edward Jenner, Alexander Fleming. Their work established germ theory, microbial fermentation and disease causation, vaccination, and the discovery of the first antibiotic - penicillin.
This document contains lecture notes on clinical immunology from Walter Wakhunu Waswa of North Coast Medical Training College. It covers various topics including:
- Classification of the immune response into innate and acquired systems.
- Types of hypersensitivity reactions including anaphylaxis, urticaria, hay fever, and asthma.
- Autoimmune diseases where the immune system attacks the body's own tissues, listing various conditions.
- Immunization methods including active immunization through vaccination and passive immunization through antibody transfer.
This document discusses the history and scope of microbiology. It begins by defining microbiology as the study of microorganisms, which are tiny creatures that can only be seen under a microscope. It then describes the branches of microbiology, including pure microbiology which focuses on taxonomy and integration of microbes, and applied microbiology which examines medical, veterinary, industrial, and other applications. The document continues by outlining the major groups of microorganisms and how they are named and classified. It concludes with an overview of the key discoveries and scientists that helped establish microbiology as a field, including the germ theory of disease and development of antibiotics.
Microbiology is the study of organisms that are usually too small to be seen by the unaided eye; it employs techniques—such as sterilization and the use of culture media—that are required to isolate and grow these microorganisms.
This document summarizes key concepts from a medical microbiology lecture, including definitions of infection, pathogens, commensals, and nonpathogens. It discusses the roles of normal flora in protecting the host and how their composition is determined. It also outlines colonization, carriage states, pathogenicity, and virulence factors. Specific examples are provided of bacterial adherence mechanisms like pili and adhesins in E. coli and S. aureus. The document also briefly discusses bacterial growth requirements, iron acquisition, and toxin production.
Mechanism of bacterial pathogenesis and virulenceMeher Rizvi
This document discusses bacterial virulence factors and mechanisms of pathogenesis. It defines key terms like pathogens, opportunistic pathogens, virulence, and colonization. It then describes several virulence factors like adhesins, pili, capsules, toxins, enzymes, and plasmids that allow bacteria to adhere to and invade host cells, evade the immune system, and cause damage. Methods of acquiring new virulence genes like plasmids, bacteriophages, and horizontal gene transfer are also summarized.
The document provides an overview of immune response properties and mechanisms. It discusses:
1) Innate immunity, which is non-specific and provides immediate defense mechanisms like anatomical barriers and phagocytosis.
2) Adaptive immunity, which is acquired and provides long-lasting, targeted defenses through humoral immunity using antibodies and cell-mediated immunity using T cells.
3) Key properties of adaptive immunity include specificity, diversity, and memory, allowing a tailored response to a wide range of pathogens.
The document discusses the body's defense systems against microbial infections. It describes the non-specific defenses provided by the normal microbiota and barriers like skin and mucus. These constitute the first line of defense. The second line involves immune cells like neutrophils and macrophages that respond to infections. The third and most specific line is the immune system consisting of B and T cells that provide long-lasting adaptive immunity.
Bacterial toxins and toxoids are discussed. Endotoxins are part of the cell wall of gram-negative bacteria and are released upon cell lysis. Exotoxins are secreted by bacteria and can have potent toxicity. Toxoids are modified exotoxins that have had their toxicity destroyed but retain antigenicity, allowing them to be used safely in vaccines. The production of tetanus toxoid involves growing Clostridium tetani bacteria, lysing the cells, purifying and concentrating the exotoxins, inactivating them with formaldehyde to create a toxoid, and formulating the vaccine product.
This document provides information on bacterial pathogenesis and virulence factors. It begins with definitions of key terms like pathogens, pathogenicity, virulence, and opportunistic pathogens. It then discusses the difference between infection and disease. Koch's postulates for establishing causation are outlined. The document explores factors that influence pathogenicity like virulence factors, number of initial organisms, and immune status of the host. Several virulence factors are described in detail, including toxins, invasiveness through adhesion and penetration of tissues, capsules that aid evading phagocytosis, siderophores for competing with the host for iron, and enzymes that can aid spreading or hydrolyze immunoglobulins.
The document discusses innate and acquired immunity. It defines innate immunity as genetic and non-specific, providing the body's first line of defense against infection through physical barriers, biochemical factors, cells, and genetics. Acquired immunity develops from exposure to antigens and involves lymphocytes and antibody production, resulting in long-lasting immunity through immunological memory. The document also distinguishes between natural and artificial active immunity, as well as natural and artificial passive immunity.
in fundamentals of plant pathology we should know about the history plant pathology. and what are land marks in the development plant pathology in history from ancient period to modern period. in this presentation we are discussing about the history plant pathology
This document summarizes bacterial toxins. It describes two main types - endotoxins and exotoxins. Endotoxins are lipopolysaccharides associated with the cell walls of gram-negative bacteria. They are heat-stable and can cause fever, shock, and death. Exotoxins are heat-labile protein toxins secreted by bacteria, including diphtheria toxin, staphylococcal enterotoxins, and streptococcal toxins. Many exotoxins have an A/B subunit structure and act intracellularly through enzymatic activity. They can cause illnesses like toxic shock syndrome. Bacterial toxins are major virulence factors that damage host cells through various mechanisms.
This document discusses bacterial pathogenesis and infection. It covers several key topics:
1) Normal flora are microorganisms that normally live in or on the human body without causing disease. Opportunistic pathogens are normal flora that can cause disease under certain conditions if the host's immunity is compromised.
2) Bacterial infection is determined by factors of both the bacterium and host. The number and virulence of bacteria as well as the host's innate and acquired immunity impact whether infection occurs.
3) Bacterial pathogenicity is influenced by virulence factors like toxins, invasiveness, and the portal of entry. Virulence refers to an organism's ability to cause disease and is determined by its inv
Plant pathology is the study of plant diseases. It deals with the causes and mechanisms of disease development, plant-pathogen interactions, and disease management methods. Some key events in the history of plant pathology include the first use of microscopy to observe fungi and bacteria in the 16th-17th centuries, the 19th century discoveries of the fungal causes of late blight and anthrax, and the early 20th century discoveries of viral and other non-fungal pathogens. Modern plant pathology incorporates genetics, microbiology, and other fields to understand and address important diseases.
Girija Bhavesh Bhanushali is a student pursuing her SYB Pharm degree at an unspecified college in 2022-2023. This document provides an introduction and overview of microbiology. It discusses the history of microbiology from early observers like Aristotle and Antonie Van Leeuwenhoek to modern founders like Louis Pasteur and Robert Koch. The document also outlines major branches of microbiology and highlights the important scope and roles of microbiology in fields like medicine, pharmaceuticals, food science, and more. It emphasizes how microbiology is crucial to health, disease treatment, vaccine development, and other areas of daily life.
The document provides an overview of the history and development of medicinal chemistry. It discusses how medicinal chemistry originated from the isolation of medicinal agents found in plants by early scientists. The field has since expanded to include the creation of new synthetic drug compounds through the application of chemical research techniques. Medicinal chemists work to synthesize and improve new pharmaceuticals in collaboration with other scientists.
Antibiotics
History and development of antibiotics
Decline of antibiotics
Bacteriophage: nature’s most abundant antibiotics
Phage specificity, resistance, transduction, lysis
Emergence of phages
Phage Case studies
Challenges to mainstream commercialization
This document discusses the history of infection control from ancient times to modern practices. It covers various ancient civilizations that practiced early forms of infection control and hygiene. It then discusses key figures and discoveries in medical history that advanced the germ theory of disease and modern infection control practices, such as antisepsis, antibiotics, and the roles of hospitals and regulations in preventing healthcare-associated infections. Risk factors and differences between community-associated and healthcare-associated MRSA are also covered. The effects of diet, stress, and lifestyle on immune function are discussed in relation to infection risk. Infection control practices for complementary therapies are proposed.
This document provides an overview of the course Fundamentals of Plant Pathology. It introduces the course teacher, Prof. J. S. Suryawanshi, and includes the course number. The first chapter covers an introduction to plant pathology, defining it as the science that deals with the study of plant diseases. It discusses how plants can get sick from biotic causes like fungi, bacteria, viruses, and abiotic causes like environmental conditions. The economic importance of plant diseases is also summarized.
Bacterial virus (Bacteriophage).
Structure of bacteriophage.
Where we can find phage?
Families of bacteriophage.
Life cycle of bacteriophage.
Potential uses of bacteriophage.
Bacteriophage vs. antibiotics.
Factors affecting phage therapy.
This document provides an overview of medical microbiology. It begins with definitions of microbiology and its branches. Microorganisms can be found nearly everywhere and most contribute to human well-being, though some cause disease. The document then discusses the history of microbiology and contributions of scientists like Pasteur and Koch. It also covers host-pathogen relationships, types of microorganisms, and important concepts in microbiology.
1. INTRODUCTION TO MEDICAL MICROBIOLOGY-1 - Copy.pptstevemash5
1. Microbiology is the study of microorganisms too small to be seen with the naked eye, including bacteria, viruses, fungi, protozoa, and algae.
2. The document discusses several topics in microbiology including the history of microbiology, key figures like Pasteur and Koch, medical microbiology, and common microbiology terminology.
3. Some of the major areas covered include the germ theory of disease, Koch's postulates, classification of microorganisms, differences between prokaryotic and eukaryotic cells, the structure and function of bacterial cell walls, and the differences between gram-positive and gram-negative bacteria.
This document provides an introduction to medical microbiology for second year public health students. It defines key microbiology terms and outlines the history and development of the field. The document discusses the classification and morphology of microorganisms and provides information on bacterial structures and functions. It also summarizes the important contributions of scientists such as Pasteur, Koch, and others to establishing microbiology as a science.
The document discusses the normal flora of the human body, including resident and transient flora. It notes that the largest population of normal flora bacteria is found in the colon, with over 400 identified species including Bacteroides fragilis as the most common. The document outlines both beneficial and harmful effects of normal flora, and discusses probiotics which can support normal flora when it is suppressed.
This document provides information on the syllabus for a Microbiology course. The syllabus covers topics including the history and development of microbiology, classification of microbes, bacterial structure and growth, isolation and culture of bacteria, microbial genetics, and important microbes in medicine and industry. Recommended textbooks are provided for further reading. The course is 3 credits and will be coordinated by Dr. Angana Sarkar, focusing on theoretical concepts in microbiology.
Through culture growth and effects on agar plates, Streptococci can be identified and differentiated. Alpha-hemolytic colonies from respiratory specimens are considered normal flora, while beta-hemolytic colonies are tested to identify the antigenic group as A or B. Identification can also be made by the ability of S. pyogenes to hydrolyze PYR, turning it bright red. Rapid immunoassay testing is also available to detect group A streptococci from throat swabs.
B.Sc. Biotech Biochem II BM Unit-1.1 Introduction to MicrobiologyRai University
1. Microbiology is the study of microorganisms, which are unicellular or cell-cluster microscopic organisms including eukaryotes such as fungi and protists, and prokaryotes which are bacteria and archaea. Viruses are also studied.
2. Major developments in the history of microbiology include the invention of the compound microscope which allowed the first observations of microbes, and the work of Leeuwenhoek, Hooke, Pasteur, and Tyndall which disproved spontaneous generation and established the germ theory of disease.
3. Microbiology has applications in fields such as medicine, agriculture, food science, ecology, genetics, biochemistry, and immunology.
This document provides an overview of microbiology and the history of the field. It discusses key topics like the discovery of microorganisms under the microscope in the 1600s and 1700s. Landmark experiments disproving spontaneous generation and establishing the germ theory of disease in the late 1800s are also summarized. The document outlines the development of vaccines, antibiotics like penicillin, and chemotherapy. It provides a brief introduction to different areas of microbiology studied today and concludes by mentioning the role of microbes in human health and disease.
This document discusses the history and production of antibiotics, specifically tetracycline. It begins with an introduction to antibiotic resistance and the discovery of penicillin in the 1920s. It then discusses the industrial production process for penicillin through fermentation using fungi and subsequent extraction methods. Modern production strains can yield 50 grams of penicillin per liter compared to early strains that yielded 0.15 grams per liter. The document also provides background on the discovery and uses of tetracycline antibiotics in the 1940s-1950s through the fermentation of soil bacteria. It describes the industrial production of tetracycline through fermentation and addition of bromides to increase yields.
This document discusses broad spectrum antibiotics. It begins with definitions of key terms like antibiotic, pharmacokinetics, and pharmacodynamics. It then covers the history of antibiotics from traditional empirical uses to the modern era including the discoveries of penicillin and other drugs. The document categorizes antibiotics based on their spectrum of activity, mechanism of action, source, and susceptible organisms. It also addresses principles of antibiotic therapy such as selection, combinations, prophylaxis, resistance, and misuse.
The immune system protects the body from pathogens through layered defenses. The innate immune system provides an immediate response, while the adaptive immune system responds to specific pathogens. Both systems must distinguish self from non-self molecules. Physical, chemical, and biological barriers comprise the first line of defense against infection, blocking pathogens from entering the body. These include mechanical barriers like skin, as well as secretions containing antimicrobial peptides and enzymes.
Microorganisms can be either helpful or harmful to humans. They are tiny living organisms too small to be seen without a microscope. Some microbes help with important processes like decomposition, while others cause infectious diseases. However, scientists have also learned to use microbes beneficially in areas like food production, medicine development like antibiotics and vaccines, waste treatment, and more. The document discusses in detail various types of microbes, their roles in different processes, and how humans have harnessed them for industrial and medical applications.
This document discusses the history and development of plant pathology. It covers major eras from ancient times to the present. Key developments include the ancient Greeks, Romans, Chinese and Indians observing plant diseases; Anton de Bary proving in 1853 that late blight of potato was caused by Phytophthora infestans, establishing him as the founder of plant pathology; and the modern era from 1853-1906 focusing on studying the role of fungi in causing plant diseases. The present era since 1906 has continued advancing our understanding of pathogens and management of diseases that impact plants.
CBD oil may have potential benefits for cancer treatment and prevention. Studies show CBD can reduce cancer cell growth, inhibit tumor development, and relieve symptoms like pain, nausea, and insomnia. However, research is still ongoing into how CBD specifically impacts different types of cancers and what doses may be effective. The endocannabinoid system plays a role in immunity and inflammation, both of which are involved in cancer development, suggesting CBD could lower cancer risk factors. More clinical trials are still needed to fully understand CBD's effects on various cancers.
The document discusses various types of fruits and vegetables that are beneficial for health and fighting cancer. It describes berries, yellow and orange fruits and vegetables, leafy greens, cruciferous vegetables, fresh herbs and spices, nuts and seeds, garlic, and broccoli as containing antioxidants and other compounds that may reduce cancer risk and promote immune system function. Steaming broccoli for 3-4 minutes is recommended to retain its cancer-fighting compounds, while broccoli sprouts are highlighted as containing higher levels of the beneficial compound sulforaphane than mature broccoli.
This document discusses nutrition for cancer prevention. It states that simple lifestyle changes like healthy eating can prevent 30-50% of all cancers. Unhealthy foods to avoid include molds, processed meats cooked at high temperatures, spoiled foods, and charred foods as they contain carcinogens like aflatoxins, heterocyclic amines, and polycyclic aromatic hydrocarbons. These dietary carcinogens are mutagenic and have been shown to damage DNA and cause cancer in laboratory experiments. Adopting a diet low in these carcinogens can help prevent many cancers.
Lycopene is a carotenoid responsible for the red color of tomatoes. Research shows lycopene may help prevent certain cancers, as eating 7+ servings of raw tomatoes weekly was linked to a 60% lower risk of stomach, colon, or rectal cancer compared to 2 or fewer servings. Lycopene has antioxidant properties and inhibits the growth of cancer cells in vitro. Studies in animals also suggest lycopene may prevent cancers of the mammary gland, liver, skin, lungs and colon. When combined with S-allylcysteine from garlic, lycopene reduced chemically induced gastric cancer in rodents.
This document summarizes Dr. Andrew Weil's anti-inflammatory diet. It recommends eating carotenoid-rich fruits and vegetables, whole grains, oils containing polyphenols like olive oil, fish and seafood, and herbs and spices. These foods contain antioxidants and nutrients that reduce inflammation. The diet avoids foods that promote inflammation, such as grains, sugar, processed oils, dairy, excess meat and cheese. Following this anti-inflammatory diet along with regular exercise can help reduce chronic inflammation and diseases linked to inflammation like arthritis, heart disease and cancer.
Osteoporosis is a condition where bone density decreases, making bones more brittle and prone to fractures. Proper nutrition and lifestyle can help prevent osteoporosis. Calcium intake is important for building strong bones, especially for women who lose bone mass quickly after menopause due to dropping estrogen levels. Other nutrients like vitamin D, magnesium, boron, and manganese also support bone health. A diet high in salt, protein, caffeine, or alcohol can negatively impact bones. Maintaining physical activity and the right calcium intake throughout life can help maximize bone density and reduce osteoporosis risk.
The document discusses the history and composition of capsicum sp. (paprika). It notes that Christopher Columbus was the first European to taste paprika, mistakenly thinking he had reached India. Paprika originated in South America and was cultivated by indigenous peoples as early as 5000 BCE before spreading to Europe, Africa, Asia, and the Middle East after Columbus brought it back. Turks introduced paprika to Serbia. The main active compounds in paprika that give it its pungency and color are capsaicinoids such as capsaicin. Higher levels of carotenoids contribute to the red color in ripe paprika. Several compounds in paprika and other spices like turmeric, ginger and garlic have shown antiviral effects
Oregano has a long history of usage dating back 50,000-70,000 years. It is commonly used as a flavoring herb, especially in Mediterranean cuisine. The main bioactive components of oregano essential oils are carvacrol and thymol. Studies have found that carvacrol has antiviral, anti-inflammatory, and immunomodulatory effects and may help treat COVID-19 by inhibiting the viral protease and reducing the cytokine response. Carvacrol shows promise as a potential natural treatment for COVID-19, though more research is still needed to fully evaluate its efficacy against SARS-CoV-2.
Peppermint is a hybrid of watermint and spearmint that is widely cultivated around the world. It has a long history of medicinal use dating back to ancient Egypt. Peppermint was first cultivated in England in the late 17th century and became popular for treating nausea, vomiting, and other ailments. Today, peppermint oil is extracted from the leaves and contains high concentrations of menthol and other compounds that provide its distinctive flavor and scent.
Curcuma longa, also known as turmeric, is a plant that is native to Indonesia and southern India. It has been used medicinally in those regions for over 5,000 years. Curcumin is the active compound in turmeric that has been shown to have antioxidant, anti-inflammatory, antiviral, and anticancer properties. Research suggests that curcumin's ability to inhibit inflammatory pathways and cytokines makes it a potential treatment for COVID-19 by reducing the severity of symptoms.
This document discusses coconut (Cocos nucifera) and coconut oil. It provides background on coconut, noting it is native to tropical regions near oceans. Coconut contains lauric acid and caprylic acid, which have anti-viral properties that can help fight infections. Coconut oil contains medium-chain triglycerides that also have anti-viral effects when broken down. Research suggests specific compounds in coconut oil like monolaurin can destroy the membrane of viruses like SARS-CoV-2 and may help treat COVID-19 patients.
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2. Certain probiotic organisms appear to enhance innate immunity (particularly
phagocytosis and natural killer cell activity), but they seem to have a less
pronounced effect on acquired immunity.
Studies show improved vaccination responses in individuals taking.
Recent systematic reviews and meta-analyses confirm that probiotics or
prebiotics (these are usually non-digestible oligosaccharides that act as
fuels for some types of bacteria enhancing their growth; many probiotics are
bifidogenic) enhance the antibody response to seasonal influenza
vaccination in adults.
The studies with probiotics have most often used lactobacilli or bifidobacteria.
3. Upon virus attack in epithelial cells, probiotic bacteria have a crucial role in
antiviral immunity via modulation of host immunological responses,
including activation of NK cells, balancing Th1/Th2-mediated immunity,
production of inflammatory cytokines, and specific antibodies
Activation of immune response leads to the differentiation of CD8+ T-lymphocytes
into cytotoxic T-lymphocytes, capable of destroying virus-infected cells. Next,
CD4+ T-lymphocytes cells can differentiate into Th1, which activates
phagocytosis through NK cells and macrophages, promoting pathogen killing.
Further, CD4+ cells differentiate into Th2 cells, which induce B-cells proliferation,
resulting in the production of antibodies that may play a crucial role in combating
coronavirus proliferation. Thus, probiotic bacteria may catalyze useful
immune responses and improve immune homeostasis in coronavirus-
infections.
4. Fig. 2. Schematic depiction of putative mechanisms by which probiotics may help manage coronavirus infection. (A) Probiotic bacteria
can hinder the adsorption process via directly binding to the virus and inhibiting entry into epithelial cells. (B) Binding of probiotic
bacteria to the epithelial surface can cause steric hindrance and block the virus's attachment to the host cell receptor. (C) Probiotic
bacteria releases antimicrobial substances (such as bacteriocins, biosurfactants, lactic acid, hydrogen peroxide, nitric oxide, organic
acids) and intestinal mucins from mucosal cells, which can effectively inhibit virus proliferation. (D) Virus neutralized by secretory
antibodies like IgA. (E) Upon virus attack in epithelial cells, probiotics mediate their antiviral effects by eliciting immune responses by
activating macrophages and dendritic cells. (F) Activation of immune response leads to differentiating CD8+ T lymphocytes into CTLs,
capable of destroying virus-infected cells. (G) CD4+ T lymphocytes cells differentiate into Th1, which activates phagocytosis through NK
cells and macrophages, promoting pathogen killing. (H) CD4+ cells differentiate into Th2 cells, which induce B-cells' proliferation that
produces antibodies like IgA, IgG, and IgM. CTLs, cytotoxic T-lymphocytes; Th1, T-helper cells type 1.
10. Oxidative stress is a condition that reflect an imbalance between biological defensive and aggressive system,
mediated by excessive production of reactive oxygen species (ROS), e.g., O2− (superoxide radical), ⋅OH (hydroxyl
radical), and H2O2 (hydrogen peroxide), in which there is an inability of the antioxidant mechanisms to neutralize
them.
This process results in toxic effects and alterations of the normal redox state, which is associated with cellular
damage and lipid peroxidation
11. Studies have shown that inflammation and oxidative stress are interconnected phenomena, which are involved in pathological
conditions as cardiovascular, kidney, liver disease, and cancer. In this way, during inflammatory events occur exacerbated
production of ROS in the damaged inflammatory tissue, which can stimulate and had a critical role in the signaling pathway for
inflammatory mediators production, such as proinflammatory cytokines and chemokines, resulting in inflammatory cell
migration.
16. • History of Phytochemicals
• Phytochemicals exist as long as plants exist
but we only know about hundred years
about their existence. Medicinal plants are
traditionally used all over the world. It is
likely that the knowledge of traditional
medicine developed through trial and error
over many centuries.
• The Chinese have the oldest medicine
system. More than 5000 years ago, the
Chinese based their medicine on the
influence of yin and yang, and on the five
elements. The earliest records about herbal
medicine dates back to 2800 BC when the
Chinese emperor Shen Nong wrote the
text The Great Native Herbal.
17. One of the first written texts covering the use of
ginseng as a medicinal herb was the Shen
Nong Pharmacopoeia, written in
China in 196 AD.
In his Compendium of Materia Medica herbal of
1596, Li Shizhen described ginseng as a
"superior tonic". However, the herb was not used
as a "cure-all" medicine, but more specifically as
a tonic for patients with chronic illnesses and
those who were convalescing.
18. Emperor Shen-Nung was the second of China's mythical emperors (3500-2600 BCE).
Widely considered the father of Chinese medicine, he catalogued over 365 species of medicinal
plants which he personally tasted. Through his treatise ‘Shen Nung Benchau Jing’, we relive
Emperor Shen-Nung's contribution to urology with reference to his management of erectile
dysfunction. Time-related sources in medical and historical literature were reviewed, including the
‘Shen Nung Benchau Jing’ (The medicine book of Emperor Shen-Nung), archives and
manuscripts at the Wellcome History of Medicine Collection, the Royal Society of Medicine,
London, The Hong Kong Museum of Medical Sciences, and The Museum of Medical History,
Shanghai, China. Chinese traditional herbal medicine began approximately 5000 years ago.
Agricultural clan leader, Emperor Shen-Nung, was said to have a ‘crystal-like belly’ to watch the
reactions in his own stomach of the herbs he collected. Ginseng was among of Shen Nung's
contributions to herbal medicine
19. Hippocrates (460-377 BC) and Aristotle (384-322 BC) introduced the
herbal medicine from India and Egypt to Europe.
20. The Greek physician Dioscorides wrote the book De Materia Medica in the
first century AD.
https://en.wikipedia.org/wiki/De_materia_medica
De materia medica (Latin name for the Greek work Περὶ ὕλης ἰατρικῆς, Peri hulēs iatrikēs, both meaning
"On Medical Material") is a pharmacopoeia of medicinal plants and the medicines that can be obtained from
them.
The five-volume work was written between 50 and 70 CE by Pedanius Dioscorides, a Greek physician in
the Roman army.
It was widely read for more than 1,500 years until supplanted by revised herbals in the Renaissance, making
it one of the longest-lasting of all natural history books.
The work describes many drugs known to be effective,
including aconite, aloes, colocynth, colchicum, henbane, opium and squill.
In all, about 600 plants are covered,
along with some animals and mineral substances,
and around 1000 medicines made from them
.
21. De materia medica was circulated as illustrated manuscripts, copied by hand, in Greek, Latin and Arabic
throughout the mediaeval period. From the sixteenth century on, Dioscorides' text was translated into Italian,
German, Spanish, and French, and in 1655 into English. It formed the basis for herbals in these languages
by men such as Leonhart Fuchs, Valerius Cordus, Lobelius, Rembert Dodoens, Carolus Clusius, John
Gerard and William Turner. Gradually these herbals included more and more direct observations,
supplementing and eventually supplanting the classical text.
Several manuscripts and early printed versions of De materia medica survive, including the
illustrated Vienna Dioscurides manuscript written in the original Greek in sixth-century Constantinople; it was
used there by the Byzantines as a hospital text for just over a thousand years. Sir Arthur Hill saw a monk
on Mount Athos still using a copy of Dioscorides to identify plants in 1934.
38. best diet to support the immune system is one with a diverse and
varied intake of vegetables, fruits, berries, nuts, seeds, grains and
pulses along with some meats, eggs, dairy products and oily fish.
This diet is consistent with those regarded as generally healthy and
is consistent with current dietary guidelines.
Such a diet would preclude too much processed and ‘junk’ food and
excessive amounts of saturated fat and sugar.
42. Vitamin A is important for normal differentiation of epithelial tissue and for immune cell maturation and
function. Thus,vitamin A deficiency is associated with impaired barrier function, altered immune responses
and increased susceptibility to a range of infections.
Many aspects of innate immunity, in addition to barrier function, are modulated by vitamin A and its
metabolites. Vitamin A controls neutrophil maturation and in vitamin A deficiency blood neutrophil
numbers are increased, but they have impaired phagocytic function. Therefore, the ability of
neutrophils to ingest and kill bacteria is impaired.
Vitamin A also supports phagocytic activity and oxidative burst of macrophages, so promoting
bacterial killing. Natural killer cell activity is diminished by vitamin A deficiency, which would impair antiviral
defences.
The impact of vitamin A on acquired immunity is less clear and may depend on the exact setting and the
vitamin A metabolite involved. Vitamin A controls dendritic cell and CD4+ T lymphocyte maturation and
its deficiency alters the balance between T helper 1 and T helper 2 lymphocytes.
43. Studies in experimental model systems indicate that the vitamin A metabolite 9-cis retinoic
acid enhances T helper 1 responses. Retinoic acid promotes movement (homing) of T lymphocytes to the
gut-associated lymphoid tissue. Interestingly, some gut-associated immune cells are able to synthesise
retinoic acid. Retinoic acid is required for CD8+ T lymphocyte survival and proliferation and for normal
functioning of B lymphocytes including antibody generation. Thus, vitamin A deficiency can impair the
response to vaccination
In support of this, vitamin A-deficient Indonesian children provided with vitamin A showed a higher antibody
response to tetanus vaccination than seen in vitamin A-deficient children.
Vitamin A deficiency predisposes to respiratory infections, diarrhea and severe measles. Systematic
reviews and meta-analyses of trials in children with vitamin A report reduced all-cause mortality, reduced
incidence, morbidity and mortality from measles and from infant diarrhoea, and improved symptoms in acute
pneumonia.
48. B vitamins are involved in intestinal immune regulation, thus contributing
to gut barrier function.
Folic acid deficiency in animals causes thymus and spleen atrophy, and
decreases circulating T lymphocyte numbers. Spleen lymphocyte
proliferation is also reduced but the phagocytic and bactericidal capacity of
neutrophils appears unchanged.
In contrast, vitamin B12 deficiency decreases phagocytic and bacterial
killing capacity of neutrophils, while vitamin B6 deficiency causes thymus
and spleen atrophy, low blood T lymphocyte numbers and impaired
lymphocyte proliferation and T lymphocyte-mediated immune responses.
49. Vitamins B6 and B12 and folate all support the activity of natural killer cells and
CD8+ cytotoxic T lymphocytes, effects which would be important in antiviral
defence.
Patients with vitamin B12 deficiency had low blood numbers of CD8+ T
lymphocytes and low natural killer cell activity.
In a study in healthy older humans, a vitamin B6-deficient diet for 21 days
resulted in a decreased percentage and total number of circulating
lymphocytes, and a decrease in T and B lymphocyte proliferation and IL-2
production.61 Repletion over 21 days using vitamin B6 at levels below those
recommended did not return immune function to starting values, while
repletion at the recommended intake (22.5 μg/kg body weight per day, which
would be 1.575 mg/day in a 70 kg individual) did. Providing excess vitamin B6
(33.75 μg/kg body weight per day, which would be 2.362 mg/day in a 70 kg
individual) for 4 days caused a further increase in lymphocyte proliferation and
IL-2 production.
53. Vit. C
• The anti-inflammatory effect of vitamin
• C has been ascribed not only to its anti-oxidant property,
• but also to direct inhibition of IkB kinase phosphorylation
• leading to eventual inhibition of NF-kB activation, which plays a critical role in inflammation.
• …..a combination of antioxidant vitamins may be effective in the treatment of asthma,
considering their
• reported effects on lowering malondialdehyde, IL-4, and
• IgE levels.
• Several studies have also suggested vitamin C
• implication in inflammation, however, some authors
• denied its anti-inflammatory role.
54. Vit. C
• Furthermore, it has been reported that vitamin C
affects lung function by influencing various
prostanoids in lung tissues and that vitamin C
deficiency increases the level of
bronchoconstrictor Prostaglandin F2α (PGF2α).
• In guinea pigs on a diet deficient in vitamin C, an
increase in airway hyper-responsiveness to
histamine was observed and in isolated guinea
pig trachea smooth muscle, vitamin C decreased
the contractions caused by PGF2α, histamine and
carbamylcholine.
55. Vit. C
• The role of vitamin C in prostaglandin
metabolism has also been strengthened by
another study in humans, where a 2-week
vitamin C diet reduced post-exercise increase in
the urinary markers for the bronchoconstrictors
leukotriene C4–E4, 9a and 11b-PGF2 as well as
exhaled nitric oxide when compared to placebo
and usual diet.
• Furthermore, another study reported that in vivo
administration of vitamin C modulates T cell
proliferation and cytokine secretion, associating
vitamin C with the immune response.
56. Vitamin C is required for collagen biosynthesis and is vital for maintaining
epithelial integrity.
It also has roles in several aspects of immunity, including leucocyte
migration to sites of infection, phagocytosis and bacterial killing, natural
killer cell activity, T lymphocyte function (especially
of CD8+ cytotoxic T lymphocytes) and antibody production.
Jacob et al. showed that a vitamin C-deficient diet in healthy young adult
humans decreased mononuclear cell vitamin C content by 50% and
decreased the T lymphocyte-mediated immune responses to recall
antigens.
57. Vitamin C deficiency in animal models increases susceptibility to a variety
of infections.
People deficient in vitamin C are susceptible to severe respiratory
infections such as pneumonia. A meta-analysis reported a significant
reduction in the risk of pneumonia with vitamin C supplementation,
particularly in individuals with low dietary intakes
Vitamin C supplementation has also been shown to decrease the duration
and severity of upper respiratory tract infections, such as the common
cold, especially in people under enhanced physical stress.
62. The active form of vitamin D (1,25-dihydroxyvitamin D3) is referred to here as vitamin D.
Vitamin D receptors have been identified in most immune cells and some cells of the
immune system can synthesise the active form of vitamin D from its precursor, suggesting
that vitamin D is likely to have important immunoregulatory properties.
Vitamin D enhances epithelial integrity and induces antimicrobial peptide (eg, cathelicidin)
synthesis in epithelial cells and macrophages,directly enhancing host defence.
However, the effects of vitamin D on the cellular components of immunity are rather
complex. Vitamin D promotes differentiation of monocytes to macrophages and increases
phagocytosis, superoxide production and bacterial killing by innate immune cells.
It also promotes antigen processing by dendritic cells although antigen presentation may
be impaired. Vitamin D is also reported to inhibit T-cell proliferation and production of
cytokines by T helper 1lymphocytes and of antibodies by B lymphocytes, highlighting the
paradoxical nature of its effects.
Effects on T helper 2 responses are not clear and vitamin D seems to increase number of
regulatory T lymphocytes. Vitamin D seems to have little impact on CD8+ T lymphocytes
63. A systematic review and meta-analysis of the influence of vitamin D status
on influenza vaccination (nine studies involving 2367 individuals) found
lower seroprotection rates to influenza A virus subtype H3N2 and to
influenza B virus in those who were vitamin D deficient.
adults showed an independent inverse association between serum 25(OH)-
vitamin D and recent upper respiratory tract infection.
Other studies also report that individuals with low vitamin D status have a
higher risk of viral respiratory tract infections.
Supplementation of Japanese schoolchildren with vitamin D for 4 months
during winter decreased the risk of influenza by about 40%.85 Meta-
analyses have concluded that vitamin D supplementation can reduce the
risk of respiratory tract infections
64. Vit. D
• supplementation
• Sunlight (5-30 min, 2x per week)
• Foods- Fish, liver, fortified foods
• (milk, cheese, OJ)
• Supplementation
• Vitamins
• Ergocalciferol (D2) or
• Cholecalciferol (D3)
• Recommended: 600-800 IU
• Replenishment: 1000-4000 IU
65. Vit. E Vit. E
(alfa, beta, gama, delta-tocopherol)
…...tocotrienol
67. In laboratory animals, vitamin E deficiency decreases lymphocyte
proliferation, natural killer cell activity, specific antibody production
following vaccination and phagocytosis by neutrophils.
Vitamin E deficiency also increases susceptibility of animals to infectious
pathogens.
Vitamin E supplementation of the diet of laboratory animals enhances
antibody production, lymphocyte proliferation, T helper 1-type cytokine
production,natural killer cell activity and macrophage phagocytosis.
Vitamin E promotes interaction between dendritic cells and CD4+ T
lymphocytes. There is a positive association between plasma vitamin E and
cell-mediated immune responses, and a negative association has been
demonstrated between plasma vitamin E and the risk of infections
in healthy adults over 60 years of age.
There appears to be particular benefit of vitamin E supplementation for the
elderly.
68. Studies by Meydani et al94 95demonstrated that vitamin E supplementation
at high doses (one study used 800 mg/day and the other95 used doses of
60, 200 and 800 mg/day) enhanced T helper 1 cell-mediatedimmunity
(lymphocyte proliferation,IL-2 production) and improved vaccination
responses, including to hepatitis B virus.
Supplementation of older adults with vitamin E (200 mg/day) improved
neutrophil chemotaxis and phagocytosis, natural killer cell activity and
mitogen-induced lymphocyte proliferation.
Secondary analysis of data from the Alpha-Tocopherol,Beta Carotene
Cancer Prevention Study identified that daily vitamin E supplements for 5
to 8 years reduced the incidence of hospital treated, community-acquired
pneumonia in smokers.
73. MK – omega 6
• Omega 6 MK mogu povećati rizik
za astmu - dugolanča arahidonska
kis. Omega 6 MK je preteča
leukotriena sa
bronhokonstriktornim delovanjem
• Visok omer unosa omega6 u
odnosu na omega 3 MK je
povezan sa rizikom od astme kod
pedijatrijske populacije
79. Iron deficiency induces thymus atrophy, reducing output of naive T lymphocytes,
and has multiple effects on immune function in humans.
The effects are wide ranging and include impairment of respiratory burst and
bacterial killing, natural killer cell activity, T lymphocyte proliferation and
production of T helper 1 cytokines.
T lymphocyte proliferation was lower by 50% to 60% in iron-deficient than in iron-
replete housebound older Canadian women.These observations would suggest a
clear case for iron deficiency increasing susceptibility to infection.
There are different explanations for the detrimental effects of iron administration
on infections. First, iron overload causes impairment of immune function.Second,
excess iron favours damaging inflammation. Third, micro-organisms require iron
and providing it may favour the growth of the pathogen. Perhaps for the latter
reasons several host immune mechanisms have developed for withholding iron
from a pathogen.
80.
81. Zn cink
• Stimulates T cell production and
• subtype switching
• Stimulates complement system
• Stimulates phagocytes
• Reduction in risk of pneumonia
• Reduction in common cold symptoms
• Reduction in infectious diarrhea (world-wide)
• Antioxidant/Inflammatory Control
82. Zn
• Deficiency associated with:
• Skin lesions, hair loss
• Loss of taste and smell, diarrhea
• Infections, poor wound healing
• Immune issues
• Increased susceptibility to infections (skin and GI system)
• Impaired phagocytosis
• Impaired NK cell activity
• Low T and B cells
83. Zinc inhibits the RNA polymerase required by RNA viruses, like
coronaviruses, to replicate,suggesting that zinc may play a key role in host
defence against RNA viruses.
In vitro replication of influenza virus was inhibited by the zinc ionophore
pyrrolidine dithiocarbamate, and there are indications that zinc might inhibit
replication of SARS-CoVs in vitro.
In addition, as discussed by Read et al, the zinc-binding metallothioneins
seem to play an important role in antiviral defence.
Zinc deficiency has a marked impact on bone marrow, decreasing the number
immune precursor cells, with reduced output of naive B lymphocytes and causes
thymic atrophy, reducing output of naive T lymphocytes. Therefore, zinc is
important in maintaining T and B lymphocyte numbers.
Zinc deficiency impairs many aspects of innate immunity,including
phagocytosis, respiratory burst and natural killer cell activity.
84. Zinc also supports the release of neutrophil extracellular traps that capture
microbes.There are also marked effects of zinc deficiency on acquired
immunity. Circulating CD4+ T lymphocyte numbers and function (eg, IL-2
and IFN-γ production) are decreased and there is a disturbance in favour of
T helper 2 cells.
Likewise, B lymphocyte numbers and antibody production are decreased in
zinc deficiency. Zinc supports proliferation of CD8+ cytotoxic T
lymphocytes, key cells in antiviral defence.
Many of the in vitro immune effects of zinc are prevented by zinc chelation.
Moderate or mild zinc deficiency or experimental zinc deficiency in humans
result in decreased natural killer cell activity, T lymphocyte proliferation, IL-
2 production and cell-mediated immune responses which can all be
corrected by zinc repletion.
85. Zinc supplementation (30 mg/day) increased T lymphocyte proliferation in
elderly care home residents in the USA, an effect mainly due to an increase
in numbers of T lymphocytes.
The wide ranging impact of zinc deficiency on immune components is an
important contributor to the increased susceptibility to infections,
especially lower respiratory tract infection and diarrhoea, seen in zinc
deficiency.
89. Copper itself has antimicrobial properties. Copper supports neutrophil,
monocyte and macrophage function and natural killer cell activity. It
promotes T lymphocyte responses such as proliferation and IL-2
production.
Copper deficiency in animals impairs a range of immune functions and
increases susceptibility to bacterial and parasitic challenges. Human
studies show that subjects on a low copper diet have decreased
lymphocyte proliferation and IL-2 production, with copper administration
reversing these effects.
94. Selenium deficiency in laboratory animals adversely affects several
components of both innate and acquired immunity, including T and B
lymphocyte function including antibody production and increases
susceptibility to infections.
Lower selenium concentrations in humans have been linked with
diminished natural killer cell activity and increased mycobacterial disease.
Selenium deficiency was shown to permit mutations of coxsackievirus,
polio virus and murine influenza virus increasing virulence.
These latter observations suggest that poor selenium status could result in
the emergence of more pathogenic strains of virus, thereby increasing the
risks and burdens associated with viral infection.
Selenium supplementation (100 to 300 μg/day depending on the study) has
been shown to improve various aspects of immune function in humans,
including in the elderly. Selenium supplementation (50 or 100 μg/day) in
adults in the UK with low selenium status improved some aspects of their
immune response to a poliovirus vaccine.
98. Synthesis of melatonin
Melatonin synthesis
The pineal gland
The retina
Lymphocytes
The GI tract
Bone marrow cells
Platelets
Skin
99.
100. Can Melatonin Be a Potential “Silver Bullet” in Treating COVID-19 Patients?
by Daniel P. Cardinali
101. Kliknite i dodajte tekst
KlikniteMelatonin as a potential “silver bullet” in the COVID 19 pandemic, as exemplified in the brain. Melatonin has
possible antiviral activity by interfering with SARS-CoV-2/angiotensin-converting enzyme 2 association. As an antioxidant,
and anti-inflammatory and immunomodulatory compound, melatonin impairs the consequences of SARS-CoV-2 infection.
Melatonin is an effective chronobiotic agent that reverse circadian disruption and delirium in intensive care unit patients.
Melatonin may prevent neurological sequelae in COVID-19-infected patients like “brain fog” and cognitive decay. Melatonin
can be an adjuvant for augmenting the efficacy of anti-SARS-CoV-2 vaccines. BBB: blood brain barrier.
i dodajte tekst
102. KlikMelatonin as a multifactorial therapeutic agent in SARS-CoV-2 infection. For explanation, see text. ROS: radical
oxygen species; RNS: radical nitrogen species. L/M R: lymphocyte/monocyte ratio.
nite i dodajte tekst
103.
104. Golden milk
• The best golden milk recipe
• Ingredients
• 1 cup unsweetened non-dairy milk, preferably coconut milk or almond milk
• 1 cup water
• 1 (3-inch) cinnamon stick
• 1 (1-inch) piece turmeric, unpeeled, thinly sliced, or 1/2 tsp dried turmeric
• 1 tsp tulsi (optional)
• 1 (1/2-inch) piece ginger, unpeeled, thinly sliced
• 1 Tbsp maple syrup/ honey
• 1 Tbsp virgin cold-pressed coconut oil
• 1/4 tsp whole black peppercorns
• Ground cinnamon (for serving)
105. Pileća supica
Originalni recept za pileću supu po doktoru Renardu
Potrebno vam je:
1 pile srednje veličine (može i koka)
0,5 kg pilećih krilaca
3 velike glavice crnog luka
1 veliki krompir
3 paštrnaka
2 korijena peršuna
7 većih šargarepa
1 veći korijen celera
1 struk peršunovog lišća
so, biber po ukusu
Priprema:
Pile operite, nalijte ga HLADNOM vodom i stavite u veći lonac da se kuva. Kada voda proključa,
smanjite vatru i dodajte krilca. Povrće očistite, isjecite na komade, pa ga ubacite u lonac. Ostavite da
se kuva na tihoj vatri sat i po. S vremena na vrijeme skidajte masnoću koja se skuplja na površini
supe. Dodajte oprano peršunovo lišće. Pola sata kasnije, izvadite meso i povrće iz supe. Meso
nemojte više vraćati u supu, a povrće izmiksajte i vratite. Na kraju posolite i pobiberite po ukusu.
106. Kuvano vino
Klasično kuvano vino
Sastojci:
3 kašike meda
1 kašika cimeta
začini za kuvano vino (2-3 cm korena đumbira, 2-3 anisa, 2-3 kardamona karanfilić, biber)
1/4 limuna
¼ pomorandže
Vino staviti u posudu i zagrejati na niskoj temperaturi tako da ne proključa. Prvo dodajte narezano voće, med
i na kraju začine. Promešajte, i pijte nakon 15-20 minuta.