Systemic subcutaneous panniculitis associated with Actinobacillus Pleuropneumoniae serotype 2 infection in a pig during meat inspection
2018
Inaba, N. (Toyama Prefectural Meat Inspection Center, Imizu (Japan)) | Satoma, M. | Sugano, Y. | Hirata, K. | Tosaki, K. | Ohba, T. | Shinmura, N. | Shibahara, T.
During meat inspection, a six-month-old pig had systemic multifocal, coalescing suppurative panniculitis in subcutaneous adipose tissues. Actinobacillus pleuropneumoniae was isolated from the subcutaneous lesions and identified as A. pleuropneumoniae serotype 2 by Multiplex PCR assay. Histologically, there were multifocal panniculitis consisting of various degrees of neutrophil and macrophage infiltrations. A large number of Gram-negative bacilli were visible in the center. Occasional Splendore-Hoeppli phenomenon was also observed. Immunohistochemically, the organisms in the lesions showed a positive reaction to antibodies against A. pleuropneumoniae serotype 2. These results indicate that the present subcutaneous suppurative panniculitis was closely associated with A. pleuropneumoniae serotype 2 infection.
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