Pulmonary hydatidosis in buffalo calves Kamdi Bhupesh P.1, Singh Shailendra1, Kumar Pawan1, Singh Vidya1, Singh Rajendra1,* 1Division of Pathology, ICAR-Indian Veterinary Research Institute, Izatnagar-243122, Uttar Pradesh, India *Corresponding author: rajendra_singh5747@rediffmail.com
Abstract Hydatidosis is an important disease with economical and zoonotic significance worldwide. It is caused by adult or larval (metacestode) stages of cestodes belonging to the genus Echinococcus, family Taeniidae in a wide range of hosts including cattle, buffaloes, sheep, goats and human beings. In the present study, 240 buffalo calves were examined for the presence of pulmonary hydatidosis and an overall incidence of 2.08% (5/240) was observed. Grossly, single to multiple enlarged, oval to oblong cysts were observed in lungs, occasionally embedded in the parenchyma. The cysts contained clear to turbid fluid and numerous protoscolices in the cystic fluid. A total of 17 cysts were observed in 5 buffalo calves and 5/17 cysts were fertile, while 12/17 cysts were sterile. Majority of the cysts were sterile indicating lesser, however, potential role of buffalo calves in transmission of hydatidosis. Microscopically, there was congestion, emphysema, atelectasis, consolidation and hepatization of the lung tissues around bronchioles, blood vessels and alveolar tissues. Interstitial and/or purulent bronchopneumonia was observed with varying degree of granulation tissues along with infiltration of lymphocytes, plasma cells, macrophages, giant cells, occasionally neutrophills and proliferation of fibro-vascular tissues. In cysts, the laminated layer was closely encapsulated by an adventitial layer, consisting of an inner wide zone of hyalinized material composed of concentric bundle of collagen interspersed by layer of necrotic, fibrillar to granulated material. The study indicated that hydatidosis is not uncommon in buffalo calves and they are potential source for transmission of hydatidosis. Top Keywords Buffalo calves, Hydatid cyst, Echinococcus granulosus. Top |