With their ability to climb steep rocky mountain areas, California bighorn sheep live in some of the most rugged environments Oregon has to offer, but no matter how high they go, the wild sheep can’t elude Mycoplasma ovipneumoniae (M. ovi) — the bacteria now widely thought to be primarily responsible for fatal infectious pneumonia in bighorns.
Respiratory disease has killed numerous wild sheep in Oregon and other western states over the past few decades and is con
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