. Resistant to heat and alcohol, and usually detected by bacterialn agglutination . Antibodies to O ags are usually IgM
GENUS:ESCHERICHIA . Main species of medical importance is Escherichia coli.
Characteristics: . Normal flora in human and animal gastrointestinal tract. . Found in soil, water and vegetation. . Most are motile; some are capsulated. Clinical features:
. Urinary tract infection- cystitis, pyelonephritis . Wound infection- appendicitis, peritonitis . Neonatal septicemia and meningitis . E.coli-associated diarrheal disease
1. Enteropathogenic E.coli(EPEC) . causes outbreaks ofself-limiting infantile diarrhea . they also cause severe diarrhea in adults . antibiotic tretment shorten the duratin of illness and
cure diarrhea 2. Enteroinvasive E.coli(EIEC) . Non-motile, non-lactose fermenting E.coli the mucosa of the ileum and colon, and
countries and travellers to these countries