Porcine ear necrosis syndrome by coinfection of porcine reproductive and respiratory syndrome virus and Staphylococcus hyicus
2017
Lee, S., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | Jung, J.Y., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | Kim, S.H., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | Kim, J.W., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | Park, J.W., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | Kang, D.Y., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | Her, J.W., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | Jeong, Y.J., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | So, B.J., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | Yoon, S.S., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea
Porcine ear necrosis syndrome is characterized by erosive and ulcerative lesions at the margin or tip of the pinna. Three growing pigs of different ages exhibited retarded growth accompanied by reddening and necrosis of ear prior to death. Gross examination showed reddening, swelling, black discoloration, scaling, and variable-sized yellowish materials and edema in ear cross section. Microscopically, thrombosis, abscess, ulceration, epidermal hyperplasia, and dermal pyogranulomatous inflammation with an intralesional bacterial colony were observed. Staphylococcus hyicus was isolated in all pigs' ears and porcine reproductive and respiratory syndrome virus was detected by PCR and immunohistochemistry.
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