What is enterotoxigenic ecoli?

What is enterotoxigenic ecoli?

Enterotoxigenic Escherichia coli, or ETEC, is the name given to a group of E. coli that produce special toxins which stimulate the lining of the intestines causing them to secrete excessive fluid, thus producing diarrhea. The toxins and the diseases that ETEC causes are not related to E. coli O157:H7.

What characteristics does E. coli have?

CHARACTERISTICS: Enteropathogenic Escherichia coli (EPEC) are in the family Enterobacteriaceae 2. The bacteria are gram negative, rod shaped, non-spore forming, motile with peritrichous flagella or nonmotile, and grow on MacConkey agar (colonies are 2 to 3 mm in diameter and red or colorless) 5.

What type of E. coli is O157 H7?

Escherichia coli O157:H7 is a serotype of the bacterial species Escherichia coli and is one of the Shiga-like toxin–producing types of E. coli. It is a cause of disease, typically foodborne illness, through consumption of contaminated and raw food, including raw milk and undercooked ground beef.

What does enterotoxigenic mean?

Refers to an organism that produces toxins in the gastrointestinal tract that cause such things as vomiting, diarrhea, and other symptoms of food poisoning.

Is enterotoxigenic E coli zoonotic?

major cause of infantile diarrhoea in develop- ing countries, are frequently associated with traveller’s diarrhoea and diarrhoea in the very young animals as piglets, lambs and calves. However, due to the species-specific binding of the fimbrial adhesins, ETEC is not regarded as a zoonotic agent.

What is the difference between E coli and E coli O157 H7?

A noteworthy difference between E. coli O157:H7 and the non-pathogenic strains was that incubation in the presence of 12.5% soy sauce allowed the growth of E. coli O157:H7 strains but reduced the viable cell numbers of non-pathogenic E. coli strains.

What is the morphology of E. coli?

Escherichia coli are typically Gram-negative, rod shaped (2.0–6.0 μm in length and 1.1–1.5 μm wide bacilli) bacteria with rounded ends. The actual shape of these bacteria does, however, vary from spherical (cocci) cells through to elongated or filamentous rods.

What is the classification of E. coli?

Gammaproteobacteria
E. coli/Class
Escherichia coli is classified taxonomically in the genus Escherichia (named after its discoverer Theodor Escherich), family Enterobacteriaceae, order Enterobacteriales, class Gammaproteobacteria, phylum Proteobacteria.

Does enterotoxigenic E coli cause bloody diarrhea?

Enterohemorrhagic E. coli (EHEC) can cause bloody diarrhea and hemolytic uremic syndrome (anemia and kidney failure).

What is unique about E coli O157 H7?

coli O157:H7 causes a severe intestinal infection in humans. It is the most common strain to cause illness in people. It can be differentiated from other E. coli by the production of a potent toxin that damages the lining of the intestinal wall causing bloody diarrhea.

What is the advantage of presence of E. coli in human intestine?

Escherichia coli can be commonly found in lower intestines of human and mammals. When E. coli locates in human large intestines, it can help digestion processes, food breakdown and absorption, and vitamin K production.

What happens if you have enterotoxigenic E coli?

What is Enterotoxigenic E. coli (ETEC)? ETEC are bacteria that colonize the small intestine and cause severe diarrhea, dysentery, abdominal cramps, and fever. ETEC can be life threatening due to significant fluid loss and severe dehydration.

What kind of enterotoxin does Escherichia coli produce?

ETEC produces enterotoxins that cause secretory diarrhea in the host intestine. Several types of enterotoxins have been identified, and a single ETEC may be capable of producing one or more enterotoxins. Both heat-labile (LT I, LT II) and heat-stable (STa, STb) enterotoxins have been identified in ETEC.

Which is the most common enterotoxigenic disease in children?

Enterotoxigenic Escherichia coli (ETEC) is the most common cause of diarrhea in children. Colonization factors (CFs) and LT enterotoxin are the major ETEC candidate vaccines. To cause disease, ETEC must adhere to the epithelium of the small intestine by means of CFs. Watery diarrhea is produced due …

What are the physical characteristics of E coli?

E. coli is characterized by having Gram negative, non-sporulating bacilli, indole production from tryptophan, not using citrate as a carbon source and not producing acetoin. In addition, it ferments glucose and lactose with gas production.