Hostname: page-component-78c5997874-fbnjt Total loading time: 0 Render date: 2024-11-02T21:43:29.707Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access Rights & Permissions [Opens in a new window]

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Chu, K. Y., Sabbaghian, H. & Massoud, J. (1966) Host-parasite relationships of Bulinus truncatus and Schistosoma haematobium in Iran. Bulletin of the World Health Organization, 34, 121–130.Google Scholar
Frandsen, F. (1978) An assessment of the compatibility between Schistosoma sp. and their intermediate hosts using the cercarial production from a population of snails. Fourth International Congress of Parasitology, Warsaw C, 105–106.Google Scholar
Frandsen, F. (1979a) Studies on the relationship between Schistosoma and their intermediate hosts. I. The genus Bulinus and Schistosoma haematobium from Egypt. Journal of Helminthology, 53, 15–29.CrossRefGoogle ScholarPubMed
Frandsen, F. (1979b) Discussion of the relationship between Schistosoma and their intermediate hosts, assessment of the degree of host-parasite compatibility and evaluation of schistosome taxonomy. Zeitschrift für Parasitenkunde, 58, 275–296.CrossRefGoogle ScholarPubMed
Fryer, S. E. (1986) Studies on the epidemiology of a Nigerian strain of Schistosoma haematobium with particular reference to the molluscan hosts. Ph.D. Thesis, University of Wales.Google Scholar
Gordon, R. M., Davey, T. H. & Peaston, H. (1934) The transmission of human bilharziasis in Sierra Leone, with an account of the life-cycle of the schistosomes concerned, S. mansoni and S. haematobium. Annals of Tropical Medicine and Parasitology, 28, 323–418.CrossRefGoogle Scholar
Jourdane, J. (1983) Mise en evidence d'un processus original de la reproduction asexuel chez Schistosoma haematobium. Comptes Rendus de l'Academie des Sciences, Paris, 296, 419–424.Google Scholar
Kechemir, N. & Theron, A. (1980) Existence of replicating sporocysts in the development cycle of Schistosoma haematobium. Journal of Parasitology, 66, 1068–1070.CrossRefGoogle ScholarPubMed
Lo, C-T. (1972) Compatibility and host-parasite relationships between species of the genus Bulinus (Basommatophora: Planorbidae) and an Egyptian strain of Schistosoma haematobium (Trematoda: Digenea). Malacologia, 11, 225–280.Google Scholar
Pflüger, W., Roushdy, M. Z. & El-Emam, M. (1984) The prepatent period and cercarial production of Schistosoma haematobium in Bulinus truncatus (Egyptian field strains) at different constant temperatures. Zeitschrift für Parasitenkunde, 70, 95–103.CrossRefGoogle ScholarPubMed
Theron, A. (1981a) Dynamics of larval populations of Schistosoma mansoni in Biomphalaria glabrata. I. Rhythmic productioin of the cercariae in monomiracidial infections. Annals of Tropical Medicine and Parasitology, 75, 71–77.CrossRefGoogle ScholarPubMed
Theron, A. (1981b) Dynamics of larval populations of Schistosoma mansoni in Biomphalaria glabrata. II. Chronobiology of the intramolluscan larval development during the shedding period. Annals of Tropical Medicine and Parasitology, 75, 547–554.CrossRefGoogle Scholar
Webbe, G. & James, C. (1972) Host-parasite relationships of Bulinus globosus and B. truncatus with strains of Schistosoma haematobium. Journal of Helminthology, 46, 185–199.CrossRefGoogle Scholar