Clinical Features Organism Symptoms Pathogenesis Escherichia coli Watery EPEC attaches to mucosal Insidious onset over 3-6 days with listlessness, (enteropathogenic; diarrhea thelial cells and poor feeding, and diarrhea. Usually lasts 5-15 EPEC) roduces cytoskeletal days. Dehydration, electrolytic imbalance changes; may invade and other complications may cause death cells Different from Antimicrobial therapy is important other Ecoli that are enteroadherent o enteroaggregative and cause diarrhea VIbrio parahaemolyticus Watery Toxin causes Abrupt onset of diarrhea in groups consuming hypersecretion; vibrios same food, especially crabs and other seafood. Recovery is usually complete in tools may be days. Food and stool cultures are positive Diagnostics: D)E coli: Gram stain-(); Pink colonies on MacConkey agar; Dark purple to black on EMB agar 2)Vibrio parahaemolyticus: Blue colonies on TCBS agar(non- sucrose fermenting)Diagnostics : 1) E. coli 2) Vibrio parahaemolyticus : Gram stain- (-) ; Pink colonies on MacConkey agar ; Dark purple to black on EMB agar. : Blue colonies on TCBS agar. ( non￾sucrose fermenting )