Mycoplasma ovipneumoniae ("Movi") is a respiratory bacterium that can cause disease in susceptible hosts. Previously thought to be host-restricted to sheep and goat species, scientists have identified Movi for the first time in healthy moose and caribou in Alaska; a bison in Montana; mule deer in New Mexico, and diseased white-tailed deer from the upper Midwest.

The Yukon Fish and Game Association executive director believes it's just a matter of time before a disease outbreak, such as pneumonia, could spread from domestic sheep to wild Dall sheep.

A bighorn sheep herd in B.C.’s interior is in trouble after coming into contact with domestic sheep and the contagious disease they carry.

A bacterial illness has spread through Baker County’s biggest herd of bighorn sheep, but a state wildlife biologist said it won’t be clear until later this year how severe the