enzootic cycle in a sentence

1. As some experiments suggest lizards are refractory to infection with " Borrelia ", it appears likely their involvement in the enzootic cycle is more complex and species-specific.
2. For example, " B . burgdorferi sensu lato " was previously thought to be hindered in its ability to be maintained in an enzootic cycle in California, because it was assumed the large lizard population would dilute the prevalence of " B . burgdorferi " in local tick populations; this has since been brought into question, as some evidence has suggested lizards can become infected.
3. It's difficult to find enzootic cycle in a sentence.