| Abstrakt: |
Pasteurellosis is a dreaded infectious disease of domestic and wild bovids caused by gram negative pasteurella microorganisms, particularly Pasteurella haemolytica and Pasteurella multocida. It is endemic among Indian buffaloes. However, breed vulnerability on the incidence of the disease in buffaloes have not been reported except a case report on Murrah buffaloes in an organized farm in West Bengal (India). The case fatality rate has been reported to be very high (75%). This paper elucidates the autopsy results, containing the macropathological, histopathological and microbial scenario of a pasteurella infected 4 years old female Surti buffalo carcass, presented for postmortem examination (PME) to the Department of Veterinary Pathology, College of Veterinary Science and Animal Husbandry, Navsari Agricultural University, Navsari, Gujarat in March, 2019. The clinical history of the case portrayed high fever, anorexia, profuse salivation, throat swelling, recumbence, and protruded tongue before death. Macropathological findings revealed accumulation of edematous gelatinous fluid in throat region with consolidated, reddened and thickened interlobular septa. Heart was severely congested with focal ecchymoses on epicardium and endocardium. Myocarditis with necrosis and bacterial emboli indicated septicemia in the deceased animal. Liver was pale and friable with multifocal necrotic areas. Fibrinous inflammation was noted on peritoneum and serosal surface of intestines. Histopathological examination revealed fibrinous suppurative bronchopneumonia with inflammatory cells inside the alveoli and interalveolar septa of the lungs. Bacterial colonies surrounded by inflammatory cells were noticed at various places along with the thickened interlobular septa of the lungs. In a few areas, severe hemorrhages and congestions were also noticed. Histological section of heart revealed multiple necrotic foci with infiltration of inflammatory cells. Impression smears from heart, lungs, liver and spleen were subjected to Giemsa's stain, which revealed numerous typical bipolar organisms suggestive of Pasteurella spp. Microscopic examination of the cultured bacterial colonies on blood agar, biochemically confirmed that the organisms belonged to Pasteurella spp. Based on clinical signs, macropathological, histopathological and microbiological examinations, the case was confirmed to be Pasteurellosis, which is an unique report in Surti buffalo. [ABSTRACT FROM AUTHOR] |
