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SESC case archive

Haemorrhagic skin lesions

In both cases illustrated here (Figures 1 and 2), the lesion is probably caused by a state of haemorrhagic diathesis or due to manipulations occurred during or around the time of slaughter.

The differential diagnosis are:

• Porcine Dermatitis and nephropathy syndrome (PDNS) in the case of the PDNS typical necrotizing lesions can be observed which usually have a central black area of discoloration. Often, to some degree, renal lesions can be noticed (particularly: increased kidney volume and renal petechiae).
• Erysipelas or "Diamond skin disease" (Erysipelothrix rhusiopathiae): Lesions show a very characteristic "diamond" morphology. Chronically Erysipelas can be associated with endocarditis or arthritis, but without skin involvement.
• Classical and African swine fever: widespread hemorrhage and sudden death. The animals usually have high fever.
• Other skin conditions: Dermatophytosis, Pityriasis rosea, Swine pox, exudative epidermitis.

Extensive skin haemorrhages, which mainly affect the ventral side of the carcass.

Generalized petechial hemorrhages in the skin and fat./caption]

[caption id="attachment_630" align="alignnone" width="550"] PDNS typical lesions in a pig, the distribution is focused on the hindquarters and lesions have central area of black discoloration which corresponds to necrosis.

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