Scanning Electron Microscopy of the Integumental Surfaces of Schistosoma haematobium

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Abstract
The integumental surfaces of critical point dried S. haematobium were studied by scanning electron microscopy at 34 to 8,000 magnifications. There are marked differences between the surface structures of male and female as well as from one part of the same parasite to another. The surface of the male schistosome is moderately rough while that of the female is relatively smooth. SEM reveals certain basic features such as spines in the oral sucker and the acetabulum of both sexes which may facilitate rasping and/or attachment of the parasite for residence in the bloodstream of the definitive host. The lining of the gynecophoral canal is roughened by minute spines. The presence of a gynecophoral fold may enhance anchorage of the female in the grasp of the male. The significance of visualization of surface features by SEM as a means for differentiating species is not yet known.

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