Pathology of Coinfection of Mycoplasma hyorhinis and Aerococcus urinae Causing FiBrinous Pericarditis in a Piglet - A Case Report Patel Sagar M.1, Thakor Jigarji Chaturji1, Singh Rajendra1, Chavan Aditya1, Vijapure Shubham2, Singh Karam Pal3, Sahoo Nihar Ranjan4, Sahoo Monalisa1,* 1Division of Pathology, Centre for Animal Disease Research and Diagnosis, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India 2Division of Pharmacology and Toxicology, Centre for Animal Disease Research and Diagnosis, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India 3Centre for Animal Disease Research and Diagnosis, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India 4ICAR-International center for Foot and Mouth Disease, Argul, Khordha, Odisha, India *Address for Correspondence, Dr Monalisa Sahoo, Division of Pathology, ICAR-Indian Veterinary Research Institute, Bareilly-243122, Uttar Pradesh, India, E-mail: vety.lisa@gmail.com
Online Published on 17 November, 2022. Abstract Fibrinous pericarditis due to co infection with Mycoplasma hyorhinis and Aerococcus urinae is rarely reported in pigs. In this case report, a one-month crossbreed male piglet with sudden death was diagnosed with fibrinous pericarditis based on necropsy, microbiological and PCR assay. The thoracic cavity was filled with large amounts of serosanguineous fluids mixed with fibrins and thickened pericardial sac adhered to the epicardium looked like bread-and-butter appearance. The cranioventral lobes of lungs showed consolidation with fibrinous exudate. Histopathology of epicardium showed fibrocellular exudates and lungs showed hyperplastic changes with congestion. The antigen of Mycoplasma hyorhinis was demonstrated in heart and lungs. Bacteriological analysis of the heart blood and spleen showed the pure growth of Aerococcus urinae. The genomic DNA of heart, lungs and spleen showed positive amplification of Mycoplasma hyorhinis targeting 16srRNA gene. The present case was diagnosed as fibrinous pericarditis in piglet due to M. hyorhinis with coinfection of Aerococcus urinae, which is often overlooked as a risk factor. Top Keywords Aerococcus urinae, Fibrinous pericarditis, Immunohistochemistry, Mycoplasma hyorhinis, Pathology, PCR, Piglet. Top |