Abstract
The worm recoveries of two different strains ofSchistosoma haematobiumfrom male hamsters and their egg-laying capacities are studied. The infection rates obtained, the growth of worms and the distribution of eggs in hamster tissues are compared with those previously described for other strains ofS. haematobium.Previous studies have shown that different geographical strains ofSchistosoma haematobiumhave specific characteristics which reflect the infra-specific variations of this complex species (Webbe and James, 1971a, b; James and Webbe, 1973). The present paper records further observations on two strains of the parasite from the Sudan (Khartoum) and South Africa (Nelspruit).

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