| Isolate | Country | Source | Provided by |
|---|---|---|---|
| 19857 * | USA New York | Cottontail rabbit | Y. Lobet |
| 19865 * | USA Connecticut | Cottontail rabbit | C. Kodner |
| 19952 * | USA New York | I. dentatus | J. F. Anderson |
| 21038 | |||
| 21123 * | USA New York | I. dentatus | J. F. Anderson |
| 21133 * | USA New York | I. dentatus | J. F. Anderson |