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The cercarial output from three Nigerian bulinids infected with two strains of Schistosoma haematobium

Published online by Cambridge University Press:  05 June 2009

S. E. Fryer  and
A. J. Probert
S. E. Fryer
Affiliation:
School of Animal Biology, University College of North Wales, Bangor, Gwynedd, LL57 2UW
A. J. Probert
Affiliation:
School of Animal Biology, University College of North Wales, Bangor, Gwynedd, LL57 2UW
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Abstract

The daily cercarial output of two Nigerian strains of Schistosoma haematobium in sympatric Bulinus truncatus, B. globosus and B. senegalensis was measured at weekly intervals from the start of emission to the snails' death. In all cases cercariae were released throughout the life of the host, with no cases of “self cure”. Patterns of output through the course of infections in B. truncatus and B. senegalensis were similar to those reported for S. haematobium by other workers, with daily production of cercariae rising to a peak within a few weeks of the onset of shedding, then declining until the host's death. In the longer lived B. globosus production was significantly higher, but declined to very low levels after the initial peak; in some individuals cercarial output remained very low, while others showed a second period of high cercarial emission. The relative compatibility of each host-parasite combination is discussed.

Keywords

Schistosoma haematobiumBulinus truncatusBulinus globosusBulinus senegalensisNigeriacercarial output
Type
Research Papers
Information
Journal of Helminthology , Volume 62 , Issue 2 , June 1988 , pp. 133 - 140
Copyright
Copyright © Cambridge University Press 1988

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