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Morphology of the teguments of schistosoma haematobium comparison with schistosoma curassoni schistosoma bovis and schistosoma intercalatum

Morphology of the teguments of schistosoma haematobium comparison with schistosoma curassoni schistosoma bovis and schistosoma intercalatum

Annales de Parasitologie Humaine et Comparee 62(6): 516-529

Study by SEM of the anterior dorsal teguments of male Schistosoma haematobium from infected rodents. Only paired males, at least hundred days past infection, display a typical morphology. Differentiation from other closely related species obtained experimentally from rodents is possible: .sbd. bovis: no spines on the tubercles; .sbd. haemotobium: tubercles 10 to 15 .mu.m wide with closely packed spines; .sbd. curassoni: tubercles over 15 .mu.m wide, with large, closely packed spines; .sbd.intercalatum: tubercles under 10 .mu.m wide, with scattered spines. It is suggested that the three haematobium genotypes A, B and D are slightly different: A: pointed spines, numerous small additional spines between the tubercles; B: pointed spines, no small additional spines between the tubercles; D: blunt spines. Moreover, the lengths of the prepartent periods in the molluscs of the three S. haematobium genotypes are possibly different: A 72-86 dyas, B 38-46 days, D 55-58 days. The differentiation of A, B and D is supported by limited data and conclusions on this particular aspect are presented only as a working hypothesis.

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