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Enterobacteriaceae 1
Eschericia species
| Aspect of Eschericia | Information |
|---|---|
| Characteristics of Eschericia coli (Main Pathogen) | Falls between Opportunistic & Overt Pathogen / Normal bowel inhabitant (coliform) / Some strains (produced in other animals) produce toxins that can cause serious GI infections |
| Clinical Signifigance | UTIs, Diarrheal disease, Sepsis, Neonatal meningitis / can cause meningitis & bacteremia in immunocompromised PTs |
| E.coli as an Opportunistic pathogen | Individuals who are debilitated or have other predisposing factors are at much higher risk for infection than healthy persons |
| Urinary Tract Infections | E. coli is an extremely common UTI in: women, toddlers in diapers, hospitalized patients w indwelling catheters / infection usually caused by fecal contamination / Organism may affect any part of the urinary tract, including the kidneys (pyelonephritis) |
| Diarrheal Infections | E. coli that cause diarrhea are classified according to certain virulence factors that result in different mechanisms of disease productions |
| Enteropathogenic E.coli (EPEC) | Diarrhea in infants in low income nations / Organism attaches to mucous cells of the small bowel |
| Enterotoxigenic E.coli (ETEC) - "Traveler's diarrhea" | Profuse, watery, stools / transmitted by contaminated food & water / enterotoxins mediate secretion of water & electrolytes into the bowel |
| Enteroinvasive E.coli (EIEC) - Dysentery | Usually in young children living in unsanitary conditions / organism invades enterocytes lining the large intestine |
| Enterohemorrhagic E.coli (EHEC) - "Hemorrhagic E.coli" | Causes bleeding of the mucosal of the intestinal lining / transmitted by undercooked ground beef or raw milk / toxin produced that increases virulence in certain serotypes including E.coli 0157:H7 |
| Enteroaggregative E.coli (EAEC) | causes prolonged watery diarrhea, pathogenic mechanism is unknown |