Two days prior to evaluation he noted explosive, watery diarrhea associated with nausea and vomiting. He ate sushi on a regular basis. The fecal examination showed a greenish watery stool that was negative for occult blood. He has a normal WBC count, hematocrit, and platelet count.
Feces has no white blood cells.
It is a gram negative rod, slightly curved. Organism is halophillic and needs salt to live.