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Co-infection of Toxoplasma gondii and porcine reproductive and respiratory syndrome virus in suckling piglets in Jeju, Korea

한국가축위생학회지 2020년 43권 4호 p.251 ~ 256
최영민, 양형석, 김재훈,
소속 상세정보
최영민 ( Choi Young-Min ) - Jeju Animal Pharm Hospital
양형석 ( Yang Hyoung-Seok ) - Jeju Self-Governing Provincial Veterinary Research Institute
김재훈 ( Kim Jae-Hoon ) - Jeju National University College of Veterinary Medicine

Abstract


Two suckling piglets, 4 days and 10 days of age, showed lethargy and dyspnea after birth and mortality had been increased after incoming gilts from breeding farm. At necropsy, the lungs showed diffuse fail to collapse with rubbery consistency, edematous dilatation of interlobular septa, and lobular consolidation with purple red color. Heart was diffuse pale in color and had several irregular linear-shaped macules or patches. Histopathologically, diffuse interstitial pneumonia with the proliferation of type II pneumocytes was present in the lungs of 2 piglets. Alveolar lumens contained necrotic cellular debris derived from neutrophils and macrophages. Multifocal hemorrhage and necrotizing pneumonia with protozoan tachyzoites were observed in the lungs. Severe multifocal to confluent necrotic myocarditis, necrotic encephalitis, and necrotic adrenalitis with intralesional protozoan tachyzoites were observed in piglets. According to immunohistochemical analysis (IHC), Toxoplasma (T.) gondii tachyzoites antigens were confirmed in lung, heart, brain, and adrenal gland. And porcine reproductive and respiratory syndrome virus (PRRSV) antigens were also detected in the cytoplasm of macrophages in lungs using IHC. Based on the gross, histopathologic and immunohistochemical features, two suckling piglets were diagnosed as co-infection of T. gondii and PRRSV.

키워드

Congenital infection; Interstitial pneumonia; Necrotic encephalitis; PRRSV; Toxoplasma gondii

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