Escherichia coli ( E. coli) are a group of bacteria. Most E. coli are harmless, but some, like Shiga toxin-producing E. coli (STEC), cause illness. Most people infected with STEC develop diarrhea (often bloody), stomach cramps, and vomiting. Symptoms typically start within 3 to 4 days after being exposed, but it can take longer.

Infection most typically occurs by eating contaminated food, particularly raw or undercooked meat. Infection can also occur after eating any product contaminated with STEC, including lettuce, alfalfa sprouts, salami, and raw (unpasteurized) milk, juice, or cider. Infected people can spread E. coli to other people if they do not wash their hands

Colonization: Definition. Colonization: presence of a microorganism on/in a host, with growth and multiplication of the organism, but without interaction between host and organism (no clinical expression, no immune response). Carrier: individual which is colonized + more. Subclinical or unapparent infection: presence of. Escherichia coli is recovered in the sputum of up to 25% of patients with CF, yet little is known about the epidemiology or clinical impact of infection. Methods: We studied patients attending a Canadian adult CF clinic who had positive sputum cultures for E coli from 1978 to 2016.
Learn more about what e. coli infection is, including its causes, symptoms and treatment. Every year, an estimated 265,000 people in the U.S. suffer from infections caused by a type of bacteria known as Shiga toxin-producing E. coli, according to the
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is e coli bacteria contagious