Escherichia coli (/ ˌ ɛ ʃ ə ˈ r ɪ k i ə ˈ k oʊ l aɪ / ESH-ə-RIK-ee-ə KOH-lye) [1] [2] is a gram-negative, facultative anaerobic, rod-shaped, coliform bacterium of the genus Escherichia that is commonly found in the lower intestine of warm-blooded organisms.

Jul 13, 2023 · E. coli is the most common gram-negative bacteria in the human gastrointestinal tract and lacks virulence in this setting. However, when found outside of the intestinal tract, E. coli can cause urinary tract infections (UTI), pneumonia, bacteremia, and peritonitis, among others.

Escherichia coli (E. coli) are a group of gram-negative bacteria that normally reside in the intestine of healthy people, but some strains can cause infection in the digestive tract, urinary tract, or many other parts of the body.

May 14, 2024 · Escherichia coli are gram-negative bacteria that live in the gastrointestinal tract. Most strains do not cause illness. Pathogenic E. coli are categorized into pathotypes based on their virulence genes. The six pathotypes of diarrheagenic E. coli are:

Jul 18, 2023 · The gram-negative bacterium Escherichia coli is the most numerous aerobic commensal inhabitant of the large intestine. Certain strains cause diarrhea, and all can cause infection when they invade sterile sites, leading to active infection.

Apr 1, 2022 · Gram-negative bacteria give negative results on the Gram staining technique, hence named gram-negative bacteria. These are bacteria with solid walls. These bacteria don’t retain the crystal violet dye and appear red-colored when viewed under a microscope on a Gram stain test.

E.coli is the second most important cause of Gram-negative rod sepsis; Perinatal infection with E.coli (exposure of newborn to E.coli colonized in the birth canal of the mother during natural birth) is the predominant cause of neonatal meningitis; Enterotoxigenic Escherichia coli (ETEC) is responsible for the traveler’s diarrhea (watery diarrhea)

Mar 27, 2024 · Escherichia coli also termed E. coli, which is a Gram-negative, facultative anaerobic, rod-shaped, coliform bacterium of the genus Escherichia. It is usually found in the lower intestine of warm-blooded organisms (endotherms).

E. coli is Gram-negative straight rod, 1-3 µ x 0.4-0.7 µ, arranged singly or in pairs (Fig. 28.1). It is motile by peritrichous flagellae, though some strains are non-motile. Spores are not formed.

Aug 1, 2023 · Staining: In the Gram stain, E. coli is classified as a gram-negative bacterium. It appears pink or red after staining, indicating that it does not retain the crystal violet stain and takes up the counterstain (safranin). Motility: Most strains of E. coli are motile due to the presence of peritrichous flagella.