| epidemiological features of an outbreak of gastroenteritis/cholera in katsina, northern nigeria. | in april 1982, katsina, in northern nigeria, was affected by an outbreak of gastroenteritis associated with vibrio cholerae serotype 'ogawa' and 662 patients were admitted to the katsina general hospital during a 16-week period. the outbreak affected all ages and both sexes and all parts of the town and its immediate surroundings except the government residential area (gra). the overall case fatality rate was 7.7%. male specific case fatality and female specific case fatality rates were 9.7 and ... | 1983 | 6886407 |