Malaria is caused by Plasmodium parasites transmitted through the bites of infected Anopheles mosquitoes. The document discusses the life cycle and types of malaria parasites, symptoms of the disease, and methods for its control and prevention. It outlines that malaria was historically believed to be caused by "bad air" but was discovered in the late 19th century to be transmitted by mosquitoes, with Ronald Ross receiving the Nobel Prize for demonstrating this transmission.
Zoonosis is a term used to describe diseases and infections that can be transmitted from animals to humans. These diseases can be caused by a variety of pathogens, including viruses, bacteria, parasites, and fungi, and can affect a wide range of animal species, including domestic pets, livestock, and wildlife.
Some examples of zoonotic diseases include:
Rabies: A viral disease that is transmitted through the bite or scratch of an infected animal, most commonly a dog.
Salmonella: A bacterial infection that is transmitted through the consumption of contaminated food, including undercooked poultry or eggs, or through contact with infected animals.
West Nile virus: A viral disease that is transmitted through the bite of an infected mosquito.
Plague: A bacterial infection that is transmitted through the bite of an infected flea, which is often carried by rats.
Lyme disease: A bacterial infection transmitted through the bite of an infected tick.
Zoonotic diseases can have a significant impact on both human and animal health, and can also have economic and social consequences. In order to prevent the spread of zoonotic diseases, it is important to implement measures such as vaccination, proper handling and preparation of food, and pest control. It is also important to educate the public about the risks and prevention of zoonotic diseases.
Zoonosis is a term used to describe diseases and infections that can be transmitted from animals to humans. These diseases can be caused by a variety of pathogens, including viruses, bacteria, parasites, and fungi, and can affect a wide range of animal species, including domestic pets, livestock, and wildlife.
Some examples of zoonotic diseases include:
Rabies: A viral disease that is transmitted through the bite or scratch of an infected animal, most commonly a dog.
Salmonella: A bacterial infection that is transmitted through the consumption of contaminated food, including undercooked poultry or eggs, or through contact with infected animals.
West Nile virus: A viral disease that is transmitted through the bite of an infected mosquito.
Plague: A bacterial infection that is transmitted through the bite of an infected flea, which is often carried by rats.
Lyme disease: A bacterial infection transmitted through the bite of an infected tick.
Zoonotic diseases can have a significant impact on both human and animal health, and can also have economic and social consequences. In order to prevent the spread of zoonotic diseases, it is important to implement measures such as vaccination, proper handling and preparation of food, and pest control. It is also important to educate the public about the risks and prevention of zoonotic diseases.
Amebiasis is an intestinal (bowel) illness caused by a microscopic (tiny) parasite called Entamoeba histolytica, which is spread through human feces (poop). Often there are no symptoms, but, sometimes it causes diarrhea (loose stool/poop), nausea (a feeling of sickness in the stomach), and weight loss.
This is a PowerPoint presentation on the Plague, also known as the Bubonic Plague and the Black Death. The presentation includes an identification of the agent involved, who is at risk, where it is most common, modes of transmission, clinical manifestations of infection, resistance, and how it could be used in bioterrorism.
This presentation focuses on a short history of bioterrorism, description, its advantages and disadvantages and organisms incorporated into weapons are also shown here.
HCM 124 lecture 9 medical entomology.pptxelphaswalela
I. OBJECTIVES
1
•To demonstrate good aseptic technique in culture transfer or inoculation and in
handling sterile materials.
•To demonstrate skil in isolation of organisms from a mixed culture using selectve
and differential media.
•To isoate microorganisms from a wide variety of sources and describe their colonial
morphology.
II. INTRODUCTION
Most environments carry a mixed microbial population. To fully appreciate the
contribution of each group of organisms to the ecology of the mass, one must first
dissect this mixed culture to obtain single colonies. The single colony is transferred
(picked) to a fresh medium to obtain a larger, homogeneous culture that may be studied
and characterized by a variety of techniques. One suchtechnique is caled aseptic
technique. Microbiologists and health workers use this technique to prevent
contamination of cultures from outside sources and to prevent the introduction of
potential disease agents into the human body (nfection can occur through contamination
of your hands and clothing with material from your bacterial cultures).
Aseptic Techniques
Aseptic techniques (also called sterile techniques) are defined as the processes
required for transferring a culture from one vessel to anotherwithout introducing any
additional organisms to the cuture or contaminating the environment with the culture.
The following conditions must exist for aseptic technique to be successful:
1. The work area must be wiped with an antiseptic to reduce the number of potential
contaminants.
2. The transfer instruments must be sterile.
3. The work must be accomplished quicky and efficiently to minimize the time of
exposure during which contamnation of the culture or laboratory worker can occur.
Developing a thorough understanding and knowledge of aseptic techniques and
culture transfer procedures is a prerequisite to working with microbiological cutures. You
wll save yourself a lot of time and energy and avoid erroneous results if a few simple
and common sense rules are observed when working with cultures.
Dr. Eby Bassiri ebassiri@sas.upenn.edu
A pest is any organism harmful to humans or human concerns. The term is particularly used for creatures that damage crops, livestock, and forestry or cause a nuisance to people, especially in their homes. Humans have modified the environment for their own purposes and are intolerant of other creatures occupying the same space when their activities impact adversely on human objectives. Thus, an elephant is unobjectionable in its natural habitat but a pest when it tramples crops.
Some animals are disliked because they bite or sting; snakes, wasps, ants, bed bugs, fleas and ticks belong in this category. Others enter the home; these include houseflies, which land on and contaminate food, beetles, which tunnel into the woodwork, and other animals that scuttle about on the floor at night, like cockroaches, which are often associated with unsanitary conditions. Agricultural and horticultural crops are attacked by a wide variety of pests, the most important being insects, mites, nematodes and gastropod molluscs. The damage they do results both from the direct injury they cause to the plants and from the indirect consequences of the fungal, bacterial or viral infections they transmit. Plants have their own defences against these attacks but these may be overwhelmed, especially in habitats where the plants are already stressed, or where the pests have been accidentally introduced and may have no natural enemies. The pests affecting trees are predominantly insects, and many of these have also been introduced inadvertently and lack natural enemies, and some have transmitted novel fungal diseases with devastating results.
Humans have traditionally performed pest control in agriculture and forestry by the use of pesticides; however, other methods exist such as mechanical control, and recently developed biological controls.Plants may be considered pests, for example, if they are invasive species or weeds. There is no universal definition of what makes a plant a pest. Some governments, such as that of Western Australia, permit their authorities to prescribe as a pest plant "any plant that, in the local government authority's opinion, is likely to adversely affect the environment of the district, the value of property in the district, or the health, comfort or convenience of the district's inhabitants."[12] An example of such a plant prescribed under this regulation is caltrop, Tribulus terrestris, which can cause poisoning in sheep and goats, but is mainly a nuisance around buildings, roadsides and recreation areas because of its uncomfortably sharp spiny burrs.Animals are considered pests or vermin when they injure people or damage crops, forestry, or buildings. Elephants are regarded as pests by the farmers whose crops they raid and trample. Mosquitoes and ticks are vectors that can transmit ailments but are also pests because of the distress caused by their bites. Grasshoppers are usually solitary herbivores of little economic importance. Many of the anima
The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body. It consists of the heart and the blood vessels running through the entire body. The arteries carry blood away from the heart; the veins carry it back to the heart. The system of blood vessels resembles a tree: The “trunk” – the main artery (aorta) – branches into large arteries, which lead to smaller and smaller vessels. The smallest arteries end in a network of tiny vessels known as the capillary network.
There isn't only one blood circulatory system in the human body, but two, which are connected: The systemic circulation provides organs, tissues and cells with blood so that they get oxygen and other vital substances. The pulmonary circulation is where the fresh oxygen we breathe in enters the blood. At the same time, carbon dioxide is released from the blood.
Illustration: Pulmonary and systemic circulation
Blood circulation starts when the heart relaxes between two heartbeats: The blood flows from both atria (the upper two chambers of the heart) into the ventricles (the lower two chambers), which then expand. The following phase is called the ejection period, which is when both ventricles pump the blood into the large arteries. In the systemic circulation, the left ventricle pumps oxygen-rich blood into the main artery (aorta). The blood travels from the main artery to larger and smaller arteries and into the capillary network. There the blood drops off oxygen, nutrients and other important substances and picks up carbon dioxide and waste products. The blood, which is now low in oxygen, is collected in veins and travels to the right atrium and into the right ventricle.
This is where pulmonary circulation begins: The right ventricle pumps low-oxygen blood into the pulmonary artery, which branches off into smaller and smaller arteries and capillaries. The capillaries form a fine network around the pulmonary vesicles (grape-like air sacs at the end of the airways). This is where carbon dioxide is released from the blood into the air inside the pulmonary vesicles, and fresh oxygen enters the bloodstream. When we breathe out, carbon dioxide leaves our body. Oxygen-rich blood travels through the pulmonary veins and the left atrium into the left ventricle. The next heartbeat starts a new cycle of systemic circulation. The pulmonary circuit: This circuit carries blood without oxygen from the heart to the lungs. The pulmonary veins return oxygenated blood to the heart.
The systemic circuit: In this circuit, blood with oxygen, nutrients and hormones travels from the heart to the rest of the body. In the veins, the blood picks up waste products as the body uses up the oxygen, nutrients and hormones.
The coronary circuit: Coronary refers to your heart’s arteries. This circuit provides the heart muscle with oxygenated blood. The coronary circuit then returns oxygen-poor blood to the heart’s right upper chamber (atrium).
Amebiasis is an intestinal (bowel) illness caused by a microscopic (tiny) parasite called Entamoeba histolytica, which is spread through human feces (poop). Often there are no symptoms, but, sometimes it causes diarrhea (loose stool/poop), nausea (a feeling of sickness in the stomach), and weight loss.
This is a PowerPoint presentation on the Plague, also known as the Bubonic Plague and the Black Death. The presentation includes an identification of the agent involved, who is at risk, where it is most common, modes of transmission, clinical manifestations of infection, resistance, and how it could be used in bioterrorism.
This presentation focuses on a short history of bioterrorism, description, its advantages and disadvantages and organisms incorporated into weapons are also shown here.
HCM 124 lecture 9 medical entomology.pptxelphaswalela
I. OBJECTIVES
1
•To demonstrate good aseptic technique in culture transfer or inoculation and in
handling sterile materials.
•To demonstrate skil in isolation of organisms from a mixed culture using selectve
and differential media.
•To isoate microorganisms from a wide variety of sources and describe their colonial
morphology.
II. INTRODUCTION
Most environments carry a mixed microbial population. To fully appreciate the
contribution of each group of organisms to the ecology of the mass, one must first
dissect this mixed culture to obtain single colonies. The single colony is transferred
(picked) to a fresh medium to obtain a larger, homogeneous culture that may be studied
and characterized by a variety of techniques. One suchtechnique is caled aseptic
technique. Microbiologists and health workers use this technique to prevent
contamination of cultures from outside sources and to prevent the introduction of
potential disease agents into the human body (nfection can occur through contamination
of your hands and clothing with material from your bacterial cultures).
Aseptic Techniques
Aseptic techniques (also called sterile techniques) are defined as the processes
required for transferring a culture from one vessel to anotherwithout introducing any
additional organisms to the cuture or contaminating the environment with the culture.
The following conditions must exist for aseptic technique to be successful:
1. The work area must be wiped with an antiseptic to reduce the number of potential
contaminants.
2. The transfer instruments must be sterile.
3. The work must be accomplished quicky and efficiently to minimize the time of
exposure during which contamnation of the culture or laboratory worker can occur.
Developing a thorough understanding and knowledge of aseptic techniques and
culture transfer procedures is a prerequisite to working with microbiological cutures. You
wll save yourself a lot of time and energy and avoid erroneous results if a few simple
and common sense rules are observed when working with cultures.
Dr. Eby Bassiri ebassiri@sas.upenn.edu
A pest is any organism harmful to humans or human concerns. The term is particularly used for creatures that damage crops, livestock, and forestry or cause a nuisance to people, especially in their homes. Humans have modified the environment for their own purposes and are intolerant of other creatures occupying the same space when their activities impact adversely on human objectives. Thus, an elephant is unobjectionable in its natural habitat but a pest when it tramples crops.
Some animals are disliked because they bite or sting; snakes, wasps, ants, bed bugs, fleas and ticks belong in this category. Others enter the home; these include houseflies, which land on and contaminate food, beetles, which tunnel into the woodwork, and other animals that scuttle about on the floor at night, like cockroaches, which are often associated with unsanitary conditions. Agricultural and horticultural crops are attacked by a wide variety of pests, the most important being insects, mites, nematodes and gastropod molluscs. The damage they do results both from the direct injury they cause to the plants and from the indirect consequences of the fungal, bacterial or viral infections they transmit. Plants have their own defences against these attacks but these may be overwhelmed, especially in habitats where the plants are already stressed, or where the pests have been accidentally introduced and may have no natural enemies. The pests affecting trees are predominantly insects, and many of these have also been introduced inadvertently and lack natural enemies, and some have transmitted novel fungal diseases with devastating results.
Humans have traditionally performed pest control in agriculture and forestry by the use of pesticides; however, other methods exist such as mechanical control, and recently developed biological controls.Plants may be considered pests, for example, if they are invasive species or weeds. There is no universal definition of what makes a plant a pest. Some governments, such as that of Western Australia, permit their authorities to prescribe as a pest plant "any plant that, in the local government authority's opinion, is likely to adversely affect the environment of the district, the value of property in the district, or the health, comfort or convenience of the district's inhabitants."[12] An example of such a plant prescribed under this regulation is caltrop, Tribulus terrestris, which can cause poisoning in sheep and goats, but is mainly a nuisance around buildings, roadsides and recreation areas because of its uncomfortably sharp spiny burrs.Animals are considered pests or vermin when they injure people or damage crops, forestry, or buildings. Elephants are regarded as pests by the farmers whose crops they raid and trample. Mosquitoes and ticks are vectors that can transmit ailments but are also pests because of the distress caused by their bites. Grasshoppers are usually solitary herbivores of little economic importance. Many of the anima
The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body. It consists of the heart and the blood vessels running through the entire body. The arteries carry blood away from the heart; the veins carry it back to the heart. The system of blood vessels resembles a tree: The “trunk” – the main artery (aorta) – branches into large arteries, which lead to smaller and smaller vessels. The smallest arteries end in a network of tiny vessels known as the capillary network.
There isn't only one blood circulatory system in the human body, but two, which are connected: The systemic circulation provides organs, tissues and cells with blood so that they get oxygen and other vital substances. The pulmonary circulation is where the fresh oxygen we breathe in enters the blood. At the same time, carbon dioxide is released from the blood.
Illustration: Pulmonary and systemic circulation
Blood circulation starts when the heart relaxes between two heartbeats: The blood flows from both atria (the upper two chambers of the heart) into the ventricles (the lower two chambers), which then expand. The following phase is called the ejection period, which is when both ventricles pump the blood into the large arteries. In the systemic circulation, the left ventricle pumps oxygen-rich blood into the main artery (aorta). The blood travels from the main artery to larger and smaller arteries and into the capillary network. There the blood drops off oxygen, nutrients and other important substances and picks up carbon dioxide and waste products. The blood, which is now low in oxygen, is collected in veins and travels to the right atrium and into the right ventricle.
This is where pulmonary circulation begins: The right ventricle pumps low-oxygen blood into the pulmonary artery, which branches off into smaller and smaller arteries and capillaries. The capillaries form a fine network around the pulmonary vesicles (grape-like air sacs at the end of the airways). This is where carbon dioxide is released from the blood into the air inside the pulmonary vesicles, and fresh oxygen enters the bloodstream. When we breathe out, carbon dioxide leaves our body. Oxygen-rich blood travels through the pulmonary veins and the left atrium into the left ventricle. The next heartbeat starts a new cycle of systemic circulation. The pulmonary circuit: This circuit carries blood without oxygen from the heart to the lungs. The pulmonary veins return oxygenated blood to the heart.
The systemic circuit: In this circuit, blood with oxygen, nutrients and hormones travels from the heart to the rest of the body. In the veins, the blood picks up waste products as the body uses up the oxygen, nutrients and hormones.
The coronary circuit: Coronary refers to your heart’s arteries. This circuit provides the heart muscle with oxygenated blood. The coronary circuit then returns oxygen-poor blood to the heart’s right upper chamber (atrium).
The lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, or exhalation). This exchange of oxygen and carbon dioxide is called respiration. The respiratory system includes the nose, mouth, throat, voice box, windpipe, and lungs.
Air enters the respiratory system through the nose or the mouth. If it goes in the nostrils (also called nares), the air is warmed and humidified. Tiny hairs called cilia (pronounced: SIL-ee-uh) protect the nasal passageways and other parts of the respiratory tract, filtering out dust and other particles that enter the nose through the breathed air.
The two openings of the airway (the nasal cavity and the mouth) meet at the pharynx (pronounced: FAR-inks), or throat, at the back of the nose and mouth. The pharynx is part of the digestive system as well as the respiratory system because it carries both food and air.
At the bottom of the pharynx, this pathway divides in two, one for food — the esophagus (pronounced: ih-SAH-fuh-gus), which leads to the stomach — and the other for air. The epiglottis (pronounced: eh-pih-GLAH-tus), a small flap of tissue, covers the air-only passage when we swallow, keeping food and liquid from going into the lungs.
The larynx, or voice box, is the top part of the air-only pipe. This short tube contains a pair of vocal cords, which vibrate to make sounds.
The trachea, or windpipe, is the continuation of the airway below the larynx. The walls of the trachea (pronounced: TRAY-kee-uh) are strengthened by stiff rings of cartilage to keep it open. The trachea is also lined with cilia, which sweep fluids and foreign particles out of the airway so that they stay out of the lungs.
At its bottom end, the trachea divides into left and right air tubes called bronchi (pronounced: BRAHN-kye), which connect to the lungs. Within the lungs, the bronchi branch into smaller bronchi and even smaller tubes called bronchioles (pronounced: BRAHN-kee-olz). Bronchioles end in tiny air sacs called alveoli, where the exchange of oxygen and carbon dioxide actually takes place. Each person has hundreds of millions of alveoli in their lungs. This network of alveoli, bronchioles, and bronchi is known as the bronchial tree.
The lungs also contain elastic tissues that allow them to inflate and deflate without losing shape. They're covered by a thin lining called the pleura (pronounced: PLUR-uh).
The chest cavity, or thorax (pronounced: THOR-aks), is the airtight box that houses the bronchial tree, lungs, heart, and other structures. The top and sides of the thorax are formed by the ribs and attached muscles, and the bottom is formed by a large muscle called the diaphragm (pronounced: DYE-uh-fram). The chest walls form a protective cage around the lungs and other contents of the chest cavity. In the tiny capillaries of the body tissues, oxygen is freed from the hemoglobin and moves into the cells.
Malpighian tubules are responsible for excretion. Glandular and ciliated cells line each tubule. They take in nitrogenous waste and convert it to uric acid, which is then expelled through the hindgut. As a result, this bug is known as uricotelic. The uricose glands and fat body nephrocytes also aid in excretion.
The respiratory system of cockroach is well developed and elaborate like those of the other terrestrial insects to compensate the absence of respiratory pigment in the blood.
It consists of a system of air tubes or tracheae through which every tissue of their body remains in direct contact with the environmental air for gaseous exchange. The environmental air enters into and escapes from the tracheae through the spiracles or stigmata.
The alimentary canal starts from mouth and it consists of the preoral cavity, pharynx, oesophagus, crop and gizzard forming the foregut or stomodaeum; the mesenteron forming the midgut and the ileum, colon and rectum constituting the hindgut or proctodaeum.
The stomodaeum and proctodaeum are ectodermal in origin and lined internally by the continuation of the exoskeletal cuticle, while the mesenteron is endodermal in origin and without cuticular lining.
The phylum Arthropoda contains a wide diversity of animals with hard exoskeletons and jointed appendages. Many familiar species belong to the phylum Arthropoda—insects, spiders, scorpions, centipedes, and millipedes on land; crabs, crayfish, shrimp, lobsters, and barnacles in water.
Ovaries, oviducts, and vagina make up the female reproductive system of the leech. There is a single pair of ovaries present on the ventral side of the 11th segment. Each ovary is formed like a coiled ribbon-shaped structure.
The ova are developed from the ovary. A short oviduct runs from each ovary. The oviducts from both sides connect to form a common oviduct.
The common oviduct opens into a pear-shaped vagina in the posterior half of the11th segment, located mid-ventrally.
The human nervous system consists of billions of nerve cells (or neurons)plus supporting (neuroglial) cells. Neurons are able to respond to stimuli (such as touch, sound, light, and so on), conduct impulses, and communicate with each other (and with other types of cells like muscle cells).
Fasciola hepatica (liver fluke) is a platyhelminth (flatworm) that is bilaterally symmetrical, triploblastic and dorso-ventrally flattened. They are unsegmented and acoelomates. They are trematodes belonging to subclass digenea. Thus, they are endoparasites with two suckers without hooks.
African Trypanosomiasis, also known as “sleeping sickness”, is caused by microscopic parasites of the species Trypanosoma brucei. It is transmitted by the tsetse fly (Glossina species), which is found only in sub-Saharan Africa.
The sporozoite, schizont and trophozoites are asexual stages, whereas gametocytes, zygote, ookinetes and oocyst are the sexual stages in the lifecycle of Plasmodium.
Sporozoite is the asexual stage of the Plasmodium. It is the infectious stage that infects humans. Sporozoites get transmitted from the female Anopheles to humans when the infected mosquito bites. The sporozoites reach the human liver cells and mature into schizonts.
Many students choice B.Sc., M.Sc in Zoology. After completion UG and PG but not option any job opportunity. Many students confused in that subject. So, I am smallest try to solve the problem of students. Thank u, Best of Luck.
More from Shri Pundlik Maharaj Mahavidyalaya, Nandura Rly. Dist. Buldana (14)
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
2. Human Malaria:
Malaria is caused by species of Plasmodium.
Transmitted through bite of female Anopheles mosquito.
In man, parasite attacks on liver cells and RBC.
That time toxic material haemozoin released by these parasites causes malaria.
History:
The word “malaria” is derived from two Italian words mala (bad) and aria (air) meaning bad air.
In past, it was believed malaria is caused by poisonous, damp air coming from marshy places or by
drinking swampy water containing bacterial and fungal spores.
In 1716, Lancisi, first of all suspected connection between the abundance of mosquitoes and the
occurrence of this disease.
In 1880, a French doctor, Charles Laveran, discovered malarial parasites (Plasmodium) in blood of
malarial patient.
Golgi (1885) and Celli observed that this parasite always occurs in RBC of malarial patient.
In 1897, Ronald Ross, an Indian Army Doctor, discovered the oocysts of Plasmodium on stomach of
female Anopheles mosquito.
In 1898, Ross studied the life cycle of avian malarial parasites in mosquito.
Mr. Shantaram Bhoye, Assistant Professor, Shri Pundlik Maharaj Mahavidyalaya, Nandura Rly., Dist. Buldana
3. Ronald Ross
In 1898, Grassi and his co-workers worked out the complete life cycle of human malarial
parasites (P. vivax) in female Anopheles mosquito.
In 1902, Ronald Ross was awarded Nobel Prize in medicine and physiology for his
discovery, that malaria is caused by Plasmodium and female Anopheles mosquito is the
vector of this parasites. This historic discovery was made on August 29, 1897.
Therefore, this day is referred to as ‘Mosquito Day’.
Mr. Shantaram Bhoye, Assistant Professor, Shri Pundlik Maharaj Mahavidyalaya, Nandura Rly., Dist. Buldana
4. Types of Malaria:
Four types of human malaria are recognized.
1) Benign Tertian or vivax malaria:
It is caused by P. vivax. Fever recurs after every 48 hours.
Death rate is low.
2) Malignant tertian or Aestivo-automnal or Pernicious Malaria:
It is caused by P. falciparum.
Fever recurs every second or third day.
In malaria the infected RBCs clump into masses which sometimes block the blood
vessels of many organs, like that brain, spleen, lungs, etc.
Death rate is very high.
It is also known as tropical epidemic malaria.
Mr. Shantaram Bhoye, Assistant Professor, Shri Pundlik Maharaj Mahavidyalaya, Nandura Rly., Dist. Buldana
5. 3) Ovale or mild tertian malaria:
It is caused by P. ovale.
Fever recurs every third day or after 48 hours.
It is not greatly harmful and is confined to tropical Africa.
4) Quartan Malaria:
It is caused by P. malariae.
Fever recurs every fourth day, that is after 72 hours.
Death rate is low, chronic infections it may give rise to lethal kidney conditions.
It is worldwide and mainly confined to tropical and subtropical regions.
5) Quotidian Malaria:
When more than one species of Plasmodium infect to patient or when 2 or 3 generations of
parasites mature on successive days this type of malaria occurs.
In this cause fever is repeated daily after an interval of 24 hours.
Mr. Shantaram Bhoye, Assistant Professor, Shri Pundlik Maharaj Mahavidyalaya, Nandura Rly., Dist. Buldana
6. Symptoms of malaria:
1) Cold stage:
At onset of fever, patient experiences a severe shaking chill with acute shivering.
This stage lasts for 20 minutes to one hour.
During, patient suffers from nausea and headache.
2) Hot stage:
Cold stage followed by hot stage.
Body temperature of the patient rises to as high 106°F.
Patient feels very hot with terrible headache.
This stage lasts for one to four hours.
This stage pulse rate of patient goes up.
Respiration quick and temperature rises.
Mr. Shantaram Bhoye, Assistant Professor, Shri Pundlik Maharaj Mahavidyalaya, Nandura Rly., Dist. Buldana
7. 3) Sweating stage:
Hot stage followed by sweating stage.
Patient sweats profusely and finally fever comes down.
Temperature becomes normal and patient feels comfortable until the next attack
which takes place at regular intervals of 48 hours in case of vivax malaria.
The total duration of paroxysm is from 6 to 10 hours depending upon species of
Plasmodium.
Mr. Shantaram Bhoye, Assistant Professor, Shri Pundlik Maharaj Mahavidyalaya, Nandura Rly., Dist. Buldana
8. Other symptoms of malaria:
The patient suffers from nausea, loss of appetite, constipation, headache, muscular pains
and sometimes insomnia.
The tongue becomes thicky coated and mouth become dry.
The patient suffers from anemia due to destruction of erythrocytes.
Malaria parasite produce haemolysin, which brings about haemolysis of some normal
erythrocytes.
In chronic cases spleen becomes enlarged.
In P. falciparum infection capillaries of brain may become plugged and death may
results.
P. falciparum, infection my result in black water fever, which is characterized by
destruction of patients erythrocytes and excretion of liberated haemoglobin in urine.
Mr. Shantaram Bhoye, Assistant Professor, Shri Pundlik Maharaj Mahavidyalaya, Nandura Rly., Dist. Buldana
9. Control of Malaria:
Malaria is one of the most important human diseases.
It kills millions of people annually.
In India prevention and control of malaria is treated as national problem and the
anti-malaria department of government deals with it.
World Health Organization (WHO) the ministry of Health of Government of India
started a National Malaria control Programme (NMCP) in the year 1953.
1) Destruction of Anopheles:
If the Anopheles mosquitoes are completely destroyed the transmission of infection
from one person to other can be checked completely.
A) Destruction of adult mosquitoes:
a) Killing by hands:
The mosquitoes which approach to bite, may be killed by hands.
Mr. Shantaram Bhoye, Assistant Professor, Shri Pundlik Maharaj Mahavidyalaya, Nandura Rly., Dist. Buldana
10. b) Using Traps:
Traps are small boxes made of wire gauze and internally lined by black paper of cloth.
Mosquitoes which tend to enter the boxes can be killed by closing the boxes.
c) Fumigation:
It is an effective method to kill or drive out the mosquitoes from the house.
Sulphur, Pyrethrum, Cresol, Tar camphor or other derivatives of naphtha are burnt to
produce poisonous fumes.
The smoke of garlic is also effective in driving the mosquitoes out.
d) Spraying:
Mosquitoes can be killed by spraying the houses with DDT, Flit, Gammexane, Pyrethrum,
Benzene and other insecticides or by using mosquitoes bombs.
e) Sterilization:
Sterilization of mosquito is very effective in controlling mosquito population. It is being
used in some parts of the world, particularly in Japan.
Mr. Shantaram Bhoye, Assistant Professor, Shri Pundlik Maharaj Mahavidyalaya, Nandura Rly., Dist. Buldana
11. B) Elimination of breading places:
Elimination of breading places is of primary importance as the larvae and pupae of
mosquitoes develop in water.
Swampy areas, marshes, ponds, pits, ditches must be drained off.
Open drains should be closed or made underground.
Do not allow water to stand in tin, cans, buckets, barrels and old tier etc.
C) Destruction of larvae and pupae:
i) Larvae and pupae of mosquito develop in water, they can be prevented from flourishing by
not allowing the water to stand in gutters, drains, river ditches, etc.
ii) Oil screens:
The mosquito larvae and pupae can be killed by spraying the water surface with petroleum,
paraffin oil, crude oil or kerosene oil.
The aquatic larvae and pupae will die due to lack of respiration or suffocation.
The oil also enters the spiracles, blocks the tracheae and poisons the body.
Mr. Shantaram Bhoye, Assistant Professor, Shri Pundlik Maharaj Mahavidyalaya, Nandura Rly., Dist. Buldana
12. iii) By spraying chemical larvicides:
Use of some chemical substances, kill the mosquito larvae and pupae by poisoning and
suffocation.
Oil solutions or emulsions of DDT, DDD and Benzene hexa-chloride are effective
larvicides.
Dust containing Paris green, DDT, BHC are effective in control or surface feeding
Anopheles larvae.
iv) Biological control of mosquito larvae and pupae:
Larvicide fishes like sticklebacks, ditches, ponds, lakes, tanks, etc.
Aquatic nymphs and insects like dragon flies, which feed on mosquito larvae and pupae
may be encouraged.
Aquatic insectivorous plants, such as bladderwort (uticularia) can also devour the larvae
and pupae of mosquitoes.
Mr. Shantaram Bhoye, Assistant Professor, Shri Pundlik Maharaj Mahavidyalaya, Nandura Rly., Dist. Buldana
13. 2) Prevention of infection or prophylaxis:
a) Protection from mosquito bite:
Building house on high grounds.
Screening of doors, windows and ventilators.
Use of mosquito nets at night.
By covering exposed parts of the body.
Use of mosquito repellents such as anti-mosquito creams, mustard oil etc. on exposed
parts of the body.
b) Use of prophylactic drugs:
Healthy persons inhabiting malarious regions should take regular does of preventive
medicines.
Certain anti-malaria drugs, such as quinine, Poludrine, Daraprim, Chloroquine are
effective against infection of malaria.
These drugs kill the sporozoites of Plasmodium.
Mr. Shantaram Bhoye, Assistant Professor, Shri Pundlik Maharaj Mahavidyalaya, Nandura Rly., Dist. Buldana
14. c) By Maintaining proper health:
Chances of infection can be minimized by getting proper nourishment, by avoiding exposure
to bad conditions and by following regularity in life.
3) Treatment of Malaria:
Plasmodium does not produce antibodies or antitoxins in human blood; therefore treatment
of malaria by inoculation or vaccines is out of question.
In allopathy various synthetic drugs like Quinine, Arabrin, Camoquine, Chloroquin,
Mepacrine, Paludrine, Plasmoquine, Rosochin, Pamaquine, Pentaquine, etc. are effective to
kill various stages of the parasites.
Mr. Shantaram Bhoye, Assistant Professor, Shri Pundlik Maharaj Mahavidyalaya, Nandura Rly., Dist. Buldana