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ID#:12825
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 photograph depicts a postmortem view of a domesticated pig’s dissected lower jaw, revealing an enlarged and hemorrhagic lymph node in a case of hog cholera (HC).

HC is a highly contagious, acute viral septicemic disease, characterized by generalized hemorrhages. The etiologic agent belongs to the family of viruses known as Flaviviridae. “Because the virus is viable at a pH of 5-10, it is not destroyed by postmortem changes, however, a temperature of 56oC will inactivate it in a few minutes. The pig is the only animal in which HC is known to occur naturally.”
“Clinical signs usually appear 5-10 days after infection. At the beginning of an outbreak young pigs may die peracutely, without clinical signs, however, acute cases are most common. Affected pigs are depressed, do not eat, and stand in a drooped attitude with the tail hanging. They are disinclined to move, and when forced , do so with a swaying movement of the hind quarters. They tend to lie down, and burrow into the bedding, often piled one atop the other.”

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
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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.

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