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Vet Pathol. 2013 Jan;50(1):144-6. doi: 10.1177/0300985812457790. Epub 2012 Aug 16.

Preliminary findings of a previously unrecognized porcine primary immunodeficiency disorder.

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Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, KS 66506-5606, USA.


Weaned pigs from a line bred for increased feed efficiency were enrolled in a study of the role of host genes in the response to infection with Porcine Reproductive and Respiratory Syndrome Virus (PRRSV). Four of the pigs were euthanatized early in the study due to weight loss with illness and poor body condition; 2 pigs before PRRSV infection and the other 2 pigs approximately 2 weeks after virus inoculation. The 2 inoculated pigs failed to produce PRRSV-specific antibodies. Gross findings included pneumonia, absence of a detectable thymus, and small secondary lymphoid tissues. Histologically, lymph nodes, spleen, tonsils, and Peyer's patches were sparsely cellular with decreased to absent T and B lymphocytes.

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