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By Shannon D. Manning, Hilary, M.D. Babcock, David Heymann

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Coli types include enteropathogenic E. coli (EPEC), enteroadherent E. coli (EAEC), enteroinvasive E. coli (EIEC), and enterotoxigenic E. coli (ETEC). In order to classify the family of diarrheagenic E. coli types further, a novel typing method was developed in 1944 that characterizes the type of polysaccharide present on the outer surface of the cell (capsule). 10 Approximately 173 distinct E. 11 E. coli O157:H7, for example, represents the 157th E. coli serotype. The use of E. coli Diseases serotyping to distinguish between diarrheagenic E.

This genotype is referred to as atypical EPEC and it appears to cause less severe disease than other EPEC types, though the diarrheal symptoms appear to last significantly longer. 13 Atypical EPEC is not restricted to developing countries as was previously suspected. 14 Enteroaggregative E. Coli Infections Enterohemmorrhagic E. coli was first identified as a cause of human disease in 1985. In the past, most EAEC infections have E. coli Diseases occurred in children living in developing countries, however, similar to EHEC and atypical EPEC, EAEC is now considered an emerging pathogen in developed countries.

1). Virtually all people are colonized with E. coli bacteria, but have no signs of an infection. In other words, they have asymptomatic colonization by E. coli, which occurs in humans just hours after birth. Colonization can involve many different types of E. , digestion) and prevent colonization by pathogenic or harmful microorganisms. The normal flora is constantly changing, with E. 1╇ E. coli adhering to the surface of the small intestine. ) acquired regularly via food or direct contact with other people.

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