Table 1 Infection prevalences for digeneans in snails and Neorickettsia in digeneans in Nelson Co., North Dakota
|  | Prevalence of digeneans = % in snails (N) | Prevalence of Neorickettsia = % among snails infected with digeneans (N) |
|---|---|---|
Pond 1 | 9% (100) | 11% (9) |
Pond 2 | 25% (187) | 23% (47) |
Pond 3 | 56% (329) | 3% (184) |
Total | 39% (616) | 8% (240) |