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Vibrio cholerae impact on humans
Cholera history essay disease report
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The Microbiology of the Vibrio cholerae Bacterium
Abstract
Cholera is a deadly disease that has caused a worldwide phenomenon throughout history. Its imperative weapon, the Vibrio cholerae bacterium, has allowed cholera to seize control and wipe out a huge percentage of the human population. V. cholerae’s toxins are the primary causes of cholera’s lethal symptoms. The bacterium contains toxins that help it accomplish its job of invading the human system and defeating the body’s powerful immune system. With its sibling bacterium Escherichia coli, V. cholerae has become one of the most dominant pathogens in the known world. V. cholerae’s strategies in causing the infamous deadly diarrhea have been widely studied, from the irritation of the intestinal epithelium to the stimulation of capillary leakage, as well as the internal effects of the disease such as the Peyer’s patches on the intestinal walls. Overall, the Vibrio cholera bacterium has made cholera a tough disease to overcome, and because of its deadly virulence factors, cholera has become one of the most frightening diseases a human body could ever encounter.
Introduction
Cholera is a diarrheal illness in the intestinal tract caused by the gram negative bacterium Vibrio cholerae. Vibrio cholerae is a member of the family vibrionaceae and of the genus Vibrio, which are fresh, brackish, or saltwater dwelling anaerobes that have the ability to ferment. Vibrios are highly halophilic, which means that they need salt-rich environment in order to thrive. They are usually rod-shaped and are either straight or curved, and are very sensitive to acid. Vibrios are motile organisms that travel with a single flagellum, and depend on saccharose sugar and starch for their growth a...
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...holera”. 2005. University of Wisconsin-Madison Department of Bacteriology. 20 July 2007.
4.) Finkelstein, Richard A. “Cholera, Vibrio cholerae O1 and O139, and Other Pathogenic Vibrios"
5.) "Vibrio cholerae." Online Image. 6 June 2001. MIT Design That Matters: Health Group Design Project. University of Wisconsin. 23 July 2007
6.) "Vibrio cholerae Attachment and Colonization in Experimental Rabbits." Online Image. Cholera, Vibrio cholerae O1 and O139, and Other Pathogenic Vibrios 23 July 2007
7.) "Sodium Movement." Online Image. Optimizing the Intestinal Health Of Baby Calves. Merriks Inc. 24 July 2007 < http://www.merricks.com/intestinal.htm >
E. Coli 0157, written by Mary Heersink, is a nerve-racking, adrenaline-filled story of a mother's experience with a then unknown deadly bacteria. The book brings up many reactions in its readers, especially the questioning of the practice of doctors in hospitals. The reader's knowledge base of scientific procedures in emergency centers was widened as well as the knowledge of how to the human body reacts to different agents in its system.
In this lab project, the microbiology students were given 2 unknown bacteria in a mixed broth each broth being numbered. The goal of this project is to determine the species of bacteria in the broth. They had to separate and isolate the bacteria from the mixed broth and ran numerous tests to identify the unknown bacteria. The significance of identifying an unknown bacteria is in a clinical setting. Determining the exact bacteria in order to prescribe the right treatment for the patient. This project is significant for a microbiology students because it gives necessary skills to them for future careers relating to clinical and research work.
The purpose of this laboratory is to learn about cultural, morphological, and biochemical characteristics that are used in identifying bacterial isolates. Besides identifying the unknown culture, students also gain an understanding of the process of identification and the techniques and theory behind the process. Experiments such as gram stain, negative stain, endospore and other important tests in identifying unknown bacteria are performed. Various chemical tests were done and the results were carefully determined to identify the unknown bacteria. First session of lab started of by the selection of an unknown bacterium then inoculations of 2 tryptic soy gar (TSA) slants, 1 nutrient broth (TSB), 1 nutrient gelatin deep, 1 motility
A.1 Concerning John Barnes, how was cholera communicated? What were the modes of disease transmission? What is the correct epidemiological term for the modes of transmission that were identified?
This book follows an esteemed doctor and a local clergyman who, together, are the heart of an investigation to solve the mystery of the cholera epidemic. In 1854 London was ravaged by a terrible outbreak of cholera, where within the span of mere weeks over five hundred people in the Soho district died. London, at the time, was a city of around two and a half million people, all crammed into a small area with no system for sewage removal. With overflowing cesspools, improper drainage of all the human and animal waste, and no system for guaranteed clean water, the people of London were in a bad state. They were essentially dumping all of their feces into their drinking water supply, a perfect environment for cholera to thrive.
Salmonella is one of the most common food-borne diseases that attack an enormous amount of people in poor countries every year. It is shown that “Today, it still attacks some 17 million people in poor countries each year, and kills about 600,000 of them. Back before antibiotics such as chloramphenicol, typhoid was very much feared” (Trek 1). Despite the advance in technology and medicine, Salmonella is
14) Davis, Charles, and Mary Nettleman, eds. "Typhus (Endemic, Murine, Epidemic)." medicinenet.com. N.p.. Web. 12 Mar 2014. .
Clostridium perfringens is a gram-positive spore-forming bacillus involved in foodborne illness and wound infection. It is an obligate anaerobe and the only member of the genus Clostridium that is non-motile. This microorganism is normally present in soil and decaying vegetation and is an inhabitant of animal and human intestines. According to the Centers for Disease Control and Prevention, C. perfringens is one of the most common sources of foodborne illness in the United States, being the cause of an estimated 1 million cases each year. However, it is also prevalent worldwide. This bacterium has the shortest reported generation time of any organism at 6.3 minutes in thioglycollate medium, making it particularly virulent after initial inoculation.
Cholera is a water-borne disease caused by the spreading of toxins throughout the intestines by the Vibrio Cholerae bacterium. Bad hygiene and other unsanitary conditions such as contamination of food and water can result in this unpleasant infection. As stated in the Gale Encyclopedia of Medicine, “contamination starts when a person infected with cholera steps into a community water supply.” Cholera is more common in places with poor cleanliness and insufficient water treatment. These locations include environments consisting of brackish rivers and coastal waters such as an underdeveloped country like Africa. Cholera can affect anyone but is usually targeted at younger ch...
Unlike the first cholera pandemic in 1817, the second one also affected countries in Europe and North America in addition to Asia. Of the seven total cholera pandemics, many consider this one the greatest of the 19th century. Cholera caused more deaths, more quickly than any other epidemic disease of the 1800s. It is an infectious disease that causes severe diarrhea that can lead to dehydration and death if untreated. Eating food or drinking water contaminated with a bacterium called Vibrio cholerae causes cholera. After the first pandemic had diminished throughout Asia by1824, the disease began spreading again from Bengal in 1826. It began with outbreaks in the Ganges River of Bengal and quickly spread throughout most of India. It had moved into Afghanistan and Persia by 1829 and surfaced in Russia in August of that year. From Russia, the disease travelled to Poland and eventually Hungary, Germany, Berlin, England, Scotland, and Wales. While the disease was penetrating most of Europe, it had also reached areas in Mesopotamia and the Arabian Peninsula by 1831. Thousands of Muslim pilgrims from Mecca died from the disease and carried it into Palestine, Syria, and Egypt that year. Mecca continued to be infected by cholera until about 1912. The disease also reached Portugal in 1833, from an English ship that docked in Portugal. Cholera’s path east of India remains
2. The specific microorganism should be isolated from the diseased animal and grown in pure culture on artificial laboratory media.
in the Time of Cholera was unveiled to the anxious world. It was highly received,
Bacterial cells, like plant cells, are surrounded by a cell wall. However, bacterial cell walls are made up of polysaccharide chains linked to amino acids, while plant cell walls are made up of cellulose, which contains no amino acids. Many bacteria secrete a slimy capsule around the outside of the cell wall. The capsule provides additional protection for the cell. Many of the bacteria that cause diseases in animals are surrounded by a capsule. The capsule prevents the white blood cells and antibodies from destroying the invading bacterium. Inside the capsule and the cell wall is the cell membrane. In aerobic bacteria, the reactions of cellular respiration take place on fingerlike infoldings of the cell membrane. Ribosomes are scattered throughout the cytoplasm, and the DNA is generally found in the center of the cell. Many bacilli and spirilla have flagella, which are used for locomotion in water. A few types of bacteria that lack flagella move by gliding on a surface. However, the mechanism of this gliding motion is unknown. Most bacteria are aerobic, they require free oxygen to carry on cellular respiration. Some bacteria, called facultatibe anaerobes can live in either the presence or absence of free oxygen. They obtain energy either by aerobic respiration when oxygen is present or by fermentation when oxygen is absent. Still other bacteria cannot live in the presence of oxygen. These are called obligate anaerobes. Such bacteria obtain energy only fermentation. Through fermentation, different groups of bacteria produce a wide variety of organic compounds. Besides ethyl alcohol and lactic acid, bacterial fermentation can produce acetic acid, acetone, butyl alcohol, glycol, butyric acid, propionic acid, and methane, the main component of natural gas. Most bacteria are heterotrophic bacteria are either saprophytes or parasites. Saprophytes feed on the remains of dead plants and animals, and ordinarily do not cause disease. They release digestive enzymes onto the organic matter. The enzymes breakdown the large food molecules into smaller molecules, which are absorbed by the bacterial cells. Parasites live on or in living organisms, and may cause disease. A few types of bacteria are Autotrophic, they can synthesize the organic nutrients they require from inorganic substances. Autotrophic bacteria are either photosynthetic or Chemosynthetic. The photosynthetic bacteria contain chlorophyll that are different from the plant chlorophyll. In bacterial photosynthesis, hydrogen is obtained by the splitting of compounds other than water.
3. Nasojejunal (NJ) or Post pyloric: The feeding tube is placed in jejunum by passing the stomach. This prevents the risk of aspiration.
Produced by the bacteria, vibrio cholerae that creates a toxin that affects the absorption of water in the small intestine, Cholera is an infectious disease. The majority of the bacteria is wiped out by gastric acid when ingested, while the surviving bacteria settle in the small intestine and begin making the toxin that produces the symptoms of Cholera. The toxin created by the bacteria, Vibrio Cholerae, is a exotoxin. Vibrio Cholerae is a member of the Vibrionaceae family of curved gram-negative rods. They are found in coastal waters and estuaries, and tend to grow best in the company of salt. However, they can develope in lower salinity when it is warmer and contains sufficient organic materials. (Harris, LaRocque, Qadri, Ryan, Calderwood/ 2012)