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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 postmortem photograph depicts the excised brain of a deceased domesticated pig, which had been ill with a case of hog cholera (HC). In this particular view, the animal’s entire brain was exhibiting signs of disease in the form of venous congestion.
“Clinical signs usually appear 5-10 days after infection. Prior to the appearance of other signs, a high temperature is usual (40.5 – 41.5oC). Other early signs include constipation, followed by diarrhea and vomiting. Later, a diffuse hyperemia and purplish discoloration of the abdominal skin occurs. Small areas of necrosis are sometimes seen on the edges of the ears, tail, lips, and vulva. A degree of conjunctivitis is usual, at times shutting the eyelids due to purulent exudates. Nervous signs are often observed including circling, incoordination, muscle tremors and convulsions are the commonest manifestations. Death usually occurs 7 – 15 days after the onset of illness.”
High Resolution: Click here for hi-resolution image (18.35 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.