Onchocerciasis Due to O. armillata in Cattle in Orissa

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Abstract
The incidence of aortic onchocerciasis was investigated by examining 167 aortas of adult cattle; of these 165 were positive for parasites and nodules.Five young calves, aged between 3 and 6 months did not reveal any aortic infection, indicating that the infection is seen in adult animals mostly.The affected aortas are invariably sclerosed, the degree of sclerosis being dependent on the degree of infestation; and the aortic nodules containing worms and microfilariae are seen on both sides but those on the outer wall mostly undergo degeneration and subsequent calcification while the nodules on the inner aspect permit the passage of microfilariae into the circulation.

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