Clostridium is a genus of anaerobic, Gram-positive bacteria. Species of Clostridium inhabit soils and the intestinal tract of animals, including humans. This genus includes several significant human pathogens, including the causative agents of botulism and tetanus.
Clostridium are anerobic gram positive rod shaped spore forming organisms responsible to cause various life threatening diseases in humans like Gas gangrene, Tetanus, Botulism, etc
Haemophilus is the name of a group of bacteria. There are several types of Haemophilus. They can cause different types of illnesses involving breathing, bones and joints, and the nervous system. One common type, Hib (Haemophilus influenzae type b), causes serious disease. It usually strikes children under 5 years old
Clostridium is a genus of anaerobic, Gram-positive bacteria. Species of Clostridium inhabit soils and the intestinal tract of animals, including humans. This genus includes several significant human pathogens, including the causative agents of botulism and tetanus.
Clostridium are anerobic gram positive rod shaped spore forming organisms responsible to cause various life threatening diseases in humans like Gas gangrene, Tetanus, Botulism, etc
Haemophilus is the name of a group of bacteria. There are several types of Haemophilus. They can cause different types of illnesses involving breathing, bones and joints, and the nervous system. One common type, Hib (Haemophilus influenzae type b), causes serious disease. It usually strikes children under 5 years old
Anaerobic Gram-Positive Spore-Forming BacilliSijo A
Gram reaction & characteristics:
Gram positive or gram variable bacilli, sore forming, obligate anaerobe, non-motile. brick-shaped rods/box car. Spores rarely seen. Spores are subterminal but difficult to induce.
Habitat:
Common inhabitant of the colon.
Virulence factor:
Produces several exotoxins; alphatoxin, the most important, mediates destruction of host cell membranes; enterotoxin inserts and disrupts membranes of mucosal cells; beta-toxin is a cytotoxin. Hemolysin, necrotizing toxin.
Disease:
Cellulitis, gas gangrene.
Alpha toxin (lecithinase) → muscle cell necrosis, degradative enzymes → subcutaneous gas bubbles → crepitus myonecrosis with crepitus (crackles), gangrenous muscles → black fluid exudate leaking from skin.
Post-abortion sepsis, abdominal infections, and enterocolitis, septicemia.
Aerobic Non-Spore-Forming Gram-Positive BacilliSijo A
Disease: listeriosis.
L. monocytogenes causes a variety of infections in neonates, pregnant women, and immunosuppressed patients.
CNS infections: meningitis, encephalitis, brain abscess, spinal cord infections.
Neonatal:
Early onset: Granulomatosis infantisepticum—in utero infection disseminated systemically that causes stillbirth.
Late onset: Bacterial meningitis.
Food poisoning, bacteremia.
Mode of transmission:
Direct contact: Human gastrointestinal tract, ingestion of contaminated food, such as meat and dairy products.
Endogenous strain: Colonized mothers may pass organism to fetus. Portal of entry is probably from gastrointestinal tract to blood and in some instances from blood to meninges.
Bacteria are microscopic, single-celled organisms that thrive in diverse environments. These organisms can live in soil, the ocean and inside the human gut. Humans' relationship with bacteria is complex. Sometimes bacteria lend us a helping hand, such as by curdling milk into yogurt or helping with our digestion
Lecture notes about the general examination of urine (Physical, chemical, and microscopic exam) for the first-year Medical Lab Technology Students.
Technical Institute of Baqubah, Middle Technical University, Baqubah, Iraq
Lecture notes about blood cell count (RBCs, WBCs, PLTs, as well as DLC)
For first-level students, Medical Lab Technology Dept. (Middle Technical University)
Erythrocyte Sedimentation Rate (ESR), a lecture for medical lab technicians at Baquba Technical Institute, Middle Technical University. All theoretical and practical notes about the test.
Notes about blood hemoglobin estimation, lecture notes to Medical Laboratory Students at Medical Laboratory Technology, Middle Technical University, Baqubah, Iraq
All about blood collection and handling, lecture notes to Medical Laboratory Students at Medical Laboratory Technology, Middle Technical University, Baqubah, Iraq
الفحص المختبري وتفسير النتائج لالتهاب الكبد الفايروسي BHussein Al-tameemi
محاضرة هامة ومبسطة في تشخيص التهاب الكبد الفايروسي نوع ب مختبريا، والتي ينبغي أن تكون محل اهتمام فنيي المختبرات ومصارف الدم العراقية والاطباء والناس عامة.
A lecture for first-year students at Baquba Technical Institute belongs to Middle Technical University. This lecture is a part of the first semester's modules (Medical Laboratory Technology: MLT112).
This lecture included an introduction to medical (or diagnostic) laboratories.
A brief presentation for second-year students in Iraqi Technical Institutes (studying Medical Laboratory Technology). This introduction covers the types of blood samples, how to collect these samples, common sites for collection, and anticoagulants in a test-tubes.
A brief presentation for second-year students in Iraqi Technical Institutes (studying Medical Laboratory Technology). This introduction covers also the teaching laboratories.
Ozempic: Preoperative Management of Patients on GLP-1 Receptor Agonists Saeid Safari
Preoperative Management of Patients on GLP-1 Receptor Agonists like Ozempic and Semiglutide
ASA GUIDELINE
NYSORA Guideline
2 Case Reports of Gastric Ultrasound
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
Knee anatomy and clinical tests 2024.pdfvimalpl1234
This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
263778731218 Abortion Clinic /Pills In Harare ,sisternakatoto
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NVBDCP.pptx Nation vector borne disease control programSapna Thakur
NVBDCP was launched in 2003-2004 . Vector-Borne Disease: Disease that results from an infection transmitted to humans and other animals by blood-feeding arthropods, such as mosquitoes, ticks, and fleas. Examples of vector-borne diseases include Dengue fever, West Nile Virus, Lyme disease, and malaria.
micro teaching on communication m.sc nursing.pdfAnurag Sharma
Microteaching is a unique model of practice teaching. It is a viable instrument for the. desired change in the teaching behavior or the behavior potential which, in specified types of real. classroom situations, tends to facilitate the achievement of specified types of objectives.
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Ve...kevinkariuki227
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
The prostate is an exocrine gland of the male mammalian reproductive system
It is a walnut-sized gland that forms part of the male reproductive system and is located in front of the rectum and just below the urinary bladder
Function is to store and secrete a clear, slightly alkaline fluid that constitutes 10-30% of the volume of the seminal fluid that along with the spermatozoa, constitutes semen
A healthy human prostate measures (4cm-vertical, by 3cm-horizontal, 2cm ant-post ).
It surrounds the urethra just below the urinary bladder. It has anterior, median, posterior and two lateral lobes
It’s work is regulated by androgens which are responsible for male sex characteristics
Generalised disease of the prostate due to hormonal derangement which leads to non malignant enlargement of the gland (increase in the number of epithelial cells and stromal tissue)to cause compression of the urethra leading to symptoms (LUTS
Acute scrotum is a general term referring to an emergency condition affecting the contents or the wall of the scrotum.
There are a number of conditions that present acutely, predominantly with pain and/or swelling
A careful and detailed history and examination, and in some cases, investigations allow differentiation between these diagnoses. A prompt diagnosis is essential as the patient may require urgent surgical intervention
Testicular torsion refers to twisting of the spermatic cord, causing ischaemia of the testicle.
Testicular torsion results from inadequate fixation of the testis to the tunica vaginalis producing ischemia from reduced arterial inflow and venous outflow obstruction.
The prevalence of testicular torsion in adult patients hospitalized with acute scrotal pain is approximately 25 to 50 percent
These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
Clostridium spp. (Practical Medical Microbiology, 13)
1. GRAM POSITIVE BACILLI
Hussein A. Abid
B. Sc. M. Clin. L. T.
Middle Technical University
Ba’aquba Medical Technical Institute
Medical Laboratory Technology Department
Practical Week: 13
2. Classification (gram +ve rods)
Non-spore formingSpore forming
• Corynebacterium spp.
• Lactobacillus spp.
• Mycobacterium spp.
• Bacillus spp.
• Clostridium spp.
2
• Bacterial spores are highly resistant, dormant structures
(i.e. no metabolic activity) formed in response to adverse
environmental conditions.
• They help in the survival of the organisms during adverse
environmental conditions; they do not have a role in
reproduction.
3. Clostridium spp.
• Gram-positive rods (at least early in growth), in singles,
pairs, or chains.
• Most are obligate anaerobes, but some are
microaerophiles.
• Produces endospores, but not aerobically; spore shape
and position are variable, but usually distend the cell
• Most are catalase-negative
• Most are isolated from soil, sewage, or marine sediments
• Key pathogens are C. tetani (tetanus), C. botulinum
(botulism), C. perfringens (food poisoning and gas
gangrene), and C. difficile (pseudomembranous colitis).
3
7. C. perfringens (Culture)
• Samples are cultured on BAP anaerobically (i.e. using jar)
• Tryptose sulphite cycloserine agar (TSCA)
• Robertson’s Cooked Meat broth & Thioglycolate broth media
7
Double zone of clear beta-hemolysis around
a colony is clearly seen (arrow)
TSCA (C. perfringens)
8. C. perfringens (Culture)
• On egg yolk medium it shows white precipitate due to
production of Lecithinase or phospholipase (Nagler’s
reaction)
• Reverse CAMP test (CAMP positive)
Positive Nagler reactionProcedure 8
9. C. difficile (Culture)
• Blood agar (anaerobically): large, flat colonies with barnyard
smell.
• Cycloserine Cefoxitin Fructose Agar (CCFA)/ selective: 4 mm
colonies appear as yellow and ground class-like and have
filamentous edge, the odor associated with colonies is very
distinct and typically like elephant or horse manure.
9CCFABlood agar
10. C. tetani (Culture)
• On blood agar it produces a
fine film of growth.
• Swarming due to its motility.
• On fresh BAP it is hemolytic
(alpha first followed by beta
hemolysis).
10
