Of 118 suspected cases, 111 (94.1%) were confirmed. The mean age of cases was 12 years (± 5.4). Majority of cases, 77.5% (86/111) were male and 85.6% (95/111) were pupils. Household and community attack rates were 23.4% (84/359) and 5.8% (111/1912) respectively. Exposure to the river through swimming (aOR = 5.0, 95% CI: (1.7-14.5)), fishing (aOR = 2.1, 95% CI: (1.1-4.0)), and drawing water (aOR = 2.9, 95% CI: (1.4-6.4)) increased the odds of infection. Open defecation was practiced among 62.5% (125/200) of residents assessed. We observed 66 residents make contact with the river within an hour of observation.