Hydatidosis is caused by the larval form of Echonococcus granulosus, a tapeworm of dogs and other carnivores. It is one of the most important world wide parasitic zoonoses, which affects a wide variety of intermediate host including wild & domestic animals and man. The hydatid cysts are found in all organs including the CNS of cattle, sheep, goat, swine and man. Incidence and prevalence of hydatidosis in cattle, buffaloes, sheep and goats in India and abroad has been extensively reported (Arene, 1985; Hayat et. al., 1986; Iqbal et. al., 1986; Kulkarni et. al., 1986; Pa! and Jamil, 1986, Deka and Gaur, 1990 and Kumar and Parihar, 1997). The onchosphere after being released in the intentine burrows into mucosa of the bowel and reaches the liver via portal vessels and there develops into hydatid. Entering general circulation, it may reach any other organ. Liver, spleen and lungs are the most affected organs. The hydatid wherever found causes destruction of the tissues of host and forms dense fibrous capsule around the cyst which ultimately exerts pressure on the adjacent tissue leading to hepatic insufficiency, digestive disturbance, ascites and dyspnoea (Sastry, 1983).
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