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Helminth infections in 3 groups of calves of different ages grazing naturally infested pastures in Ghana from March 1987 to May 1988 were studied. Calves in which the faecal egg output was followed from birth showed Toxocara vitulorum ova as early as 2 days after birth and maximum patency occurred...

Agyei, A. D.
Tropical Animal Health and Production, 1991, 23, 3, pp 134-140