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Escherichia coli

A rod-shaped bacterium that normally lives in the human intestine, some strains of which cause infection.

esh-uh-RIK-ee-uh KOH-lye noun

What it means

A gram-negative bacterium that is part of the normal gut flora. Outside the intestine it causes infection: it is the most common cause of urinary tract infectionYUR-ih-nair-ee TRAKT in-FEK-shunAn infection anywhere in the urinary tract: the kidneys, ureters, bladder or urethra.Full entry . Some strains, such as O157:H7, spread through undercooked beef, unwashed produce or contaminated water and cause bloody diarrhea; in children this can lead to hemolytic uremic syndrome, a kind of kidney failure.

For the nurse

Teach good hand hygiene, wiping from front to back, cooking ground beef thoroughly and washing produce. Report bloody diarrhea, and in a child with recent diarrhea watch urine output.

At a glance

SpanishEscherichia coli
Also writtenE. coli

Related terms

urinary tract infection

An infection anywhere in the urinary tract: the kidneys, ureters, bladder or urethra.

diarrhea

Loose or watery stools, usually three or more times a day or more often than normal for the person.

bacterium

A tiny one-celled living thing, seen only under a microscope, of which some kinds cause disease; the plural is bacteria.

pathogen

A germ, such as a bacterium, virus, fungus or parasite, that can cause disease.

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