Isolation and identification of Vibrio cholerae serogroup O1 or O139 by culture of a stool specimen remains the gold standard for the laboratory diagnosis of cholera. Cary Blair media is ideal for transport, and the selective thiosulfate–citrate–bile salts agar (TCBS) is ideal for isolation and identification.
What is the cholera toxin called?
CTX
Cholera toxin (also known as choleragen and sometimes abbreviated to CTX, Ctx or CT) is AB5 multimeric protein complex secreted by the bacterium Vibrio cholerae. CTX is responsible for the massive, watery diarrhea characteristic of cholera infection. It is a member of the Heat-labile enterotoxin family.
What are the two types of cholera?
Two serogroups (O1 and O139) or types of Vibrio cholerae bacteria can produce cholera toxin that causes the disease we call cholera.
What is dipstick test for cholera?
In 2003, the Institut Pasteur developed a rapid dipstick test for the detection of Vibrio cholerae from stool specimens. The test is based on immunochromatography and colorimetric reporting, and detects V. cholerae O1 and O139 antigens binding to antibodies fixed on a nitrocellulose strip.
Is Vibrio Gram positive or negative?
Vibrio are gram-negative bacteria that are naturally found in warm, salty marine environments, such as salt water and brackish water. More than 20 Vibrio species can cause the human illness vibriosis.
Why does cholera toxin cause diarrhea?
A bacterium called Vibrio cholerae causes cholera infection. The deadly effects of the disease are the result of a toxin the bacteria produces in the small intestine. The toxin causes the body to secrete enormous amounts of water, leading to diarrhea and a rapid loss of fluids and salts (electrolytes).
What does enterotoxin mean?
An enterotoxin is a substance that is harmful to your digestive system. It is produced by certain bacteria. The enterotoxin enters your stomach and intestines if you eat contaminated food or water. This causes symptoms such as cramps, nausea, vomiting, or diarrhea.
Why is cholera called the Blue Death?
Cholera has been nicknamed the “blue death” because a person’s skin may turn bluish-gray from extreme loss of fluids [4].
Is cholera a virus or bacteria?
Cholera is an acute diarrheal illness caused by infection of the intestine with Vibrio cholerae bacteria. People can get sick when they swallow food or water contaminated with cholera bacteria. The infection is often mild or without symptoms, but can sometimes be severe and life-threatening.
How do you speak hepatitis?
Here are 4 tips that should help you perfect your pronunciation of ‘hepatitis’:
- Break ‘hepatitis’ down into sounds: [HEP] + [UH] + [TY] + [TIS] – say it out loud and exaggerate the sounds until you can consistently produce them.
- Record yourself saying ‘hepatitis’ in full sentences, then watch yourself and listen.
