RESUMEN
The use of monodose (800 mg) per os of Norfloxacin was evaluated in 32 patients with cholera at Salvador Mazza's Hospital, Salta, Argentina. It was considered the celerity in negativization of stool culture (100 of cases: 12 hours post administration), it efficiency along time (24/24 controlled patients were negative at 10th day) and MIC of isolated strains (100 of strains were sensitive: range 0.008 to 0.016 micrograms/ml). It was included oral administration of sorbitol 70 in peanut oil in order to study patients at 10th day's control. This method could be an alternative one in the study of asymptomatic carrier. Norfloxacin monodose shows good performance in early negativization of stool culture and it was also effective along the whole observation period, suggesting it could prevent carriage.