Residents and visitors to a small town with an unchlorinated water supply who developed bloody diarrhea and abdominal cramps between 15-December-1989 and 20-January-1990. During this time, 243 case patients were identified... 86 developed bloody stool, 32 were hospitalized, 4 died and 2 developed hemolytic uremic syndrome. Question The CDC was called in to investigate the outbreak and took water samples for analysis. After isolating several microbes, the scientists at the CDC performed a number of biochemical tests to determine the nature of these organisms. The results follow.