“Ever heard of Sheep Measles?” It’s really not “measles” as we humans know it. The “measles” in sheep measles are really cysts caused by two different tapeworms, spread by dogs.
This disease can be controlled to some extent then by deworming dogs. Yes, as you might, expect coyotes also carry the tapeworms. However, deworming your domestic dogs can substantially reduce this problem.
Source: Cleon's Corner
Read full article by Cleon Kimberling, DVM