Search results
Results From The WOW.Com Content Network
Many bacteria, such as Vibrio, are monoflagellated and have a single flagellum at one pole of the cell. Their method of chemotaxis is different. Others possess a single flagellum that is kept inside the cell wall. These bacteria move by spinning the whole cell, which is shaped like a corkscrew. [25] [page needed]
The net movement can be seen in the beaker, where the bacteria accumulate around the attractant, and away from the repellent. The beaker used in this illustration is from Wikimedia Commons - "Laboratory Glassware - Beaker" by Amanda44. Chemotaxis assays are experimental tools for evaluation of chemotactic ability of prokaryotic or eukaryotic ...
Enterotoxigenic Escherichia coli (ETEC) is a type of Escherichia coli and one of the leading bacterial causes of diarrhea in the developing world, [1] as well as the most common cause of travelers' diarrhea. [2] Insufficient data exists, but conservative estimates suggest that each year, about 157,000 deaths occur, mostly in children, from ETEC.
E.coli causes intestinal infections, some intestinal infections include diarrhea, fever and abdominal pain. Most severe cases can lead to bloody diarrhea, dehydration or even kidney failure. People with weakened immune systems, young children, older adults and pregnant women are at increased risks for developing these complications.
Staphylococcal enteritis is an inflammation that is usually caused by eating or drinking substances contaminated with staph enterotoxin. The toxin, not the bacterium, settles in the small intestine and causes inflammation and swelling. This in turn can cause abdominal pain, cramping, dehydration, diarrhea and fever. [1]
E. coli and related bacteria constitute about 0.1% of gut flora, [4] and fecal–oral transmission is the major route through which pathogenic strains of the bacterium cause disease. Cells are able to survive outside the body for only a limited amount of time, which makes them ideal indicator organisms to test environmental samples for fecal ...
Diagnosis is by stool culture or testing for the bacteria's DNA or toxins. [1] If a person tests positive but has no symptoms, the condition is known as C. difficile colonization rather than an infection. [1] Prevention efforts include terminal room cleaning in hospitals, limiting antibiotic use, and handwashing campaigns in hospitals. [2]
In addition to using chemotaxis to avoid areas of high acidity (low pH), H. pylori also produces large amounts of urease, an enzyme which breaks down the urea present in the stomach to produce ammonia and bicarbonate, which are released into the bacterial cytosol and the surrounding environment, creating a neutral area. [90]