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Description:From the “Illustrated Manual for the Recognition and Diagnosis of Certain Animal Diseases”, published in 1982, by the Mexico-United States Commission for the Prevention of Foot and Mouth Disease this image depicts a close view of a sheep’s muzzle revealing the presence of crusts around the animal’s nares and lips, found to be due to a bluetongue (BT) infection. This virus is a Reoviridae family member, and a member of the genus, Orbivirus.
“BT is an infectious, but non-contagious viral disease of ruminants transmitted by insects, and characterized by congestion, edema and hemorrhage in an affected animal. In sheep, symptoms include fever, emaciation, oral lesions, lameness, and a substantial death rate, frequently with the heaviest losses in lambs. Cattle usually have a milder disease with a low mortality rate; sometimes the disease in cattle may be diagnosed only by inoculating sheep with bovine materials. In Africa, BT has been confused with foot-and-mouth disease.”
High Resolution: Click here for hi-resolution image (18.34 MB)
Content Providers(s):CDC/ Dr. Jerry J. Callis, PIADC/Dr. Brian W.J. Mahy, CDC
Creation Date:1982
Photo Credit:
Links:Plum Island Animal Disease Center (PIADC) - United States Department of Agriculture (USDA) – Agricultural Research Service (ARS) – U.S. Department of Homeland Security
CDC Organization
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Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.