| cholera in metropolitan manila: foodborne transmission via street vendors. | reported are the results of an unmatched case-control study to determine the risk factors associated with acquisition of cholera in manila. cases were patients admitted to the san lazaro hospital between july and september 1989 and whose stools yielded vibrio cholerae o1 on culture. controls were patients admitted to the same hospital and who had no history of diarrhoea or of having taken antibiotics during the 3 days prior to admission. of the 158 cases and 158 controls who had bought food from ... | 1994 | 7955024 |