Abstract
Using two chronobiological variants ofSchistosoma mansoni (a blood fluke infecting man) from Guadeloupe (French West Indies), we carried out experimental crossbreeding between schistosomes with an early and those with a late cercarial shedding pattern. The results obtained on the F1 (intermediate shedding patterns) and F2 generations (early, intermediate, and late patterns) demonstrate that the cercarial emergence rhythms of schistosomes are genetically determined. This genetic variability is interpreted as a consequence of the selective pressure exerted by the two different hosts (man and rat) implicated in the life cycle ofS. mansoni from the Guadeloupean focus of schistosomiasis.
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References
Combes, C. (1980). Les mécanismes de recrutement chez les Métazoaires parasites et leur interprétation en termes de stratégies démographiques.Vie Milieu 30:55–63.
Combes, C., and Théron, A. (1977). Rythmes démergence des cercaires de Trématodes et leur intérêt dans l'infestation de l'homme et des animaux.Inst. Biol. Publ. 4:141–150.
Jourdane, J., and Théron, A. (1980)Schistosoma mansoni: Cloning by microsurgical transplantation of sporocyst.Exp. Parasitol. 50:349–357.
Pitchford, R. J., Meyling, A. H., Meyling, J., and Dutoit, J. F. (1969). Cercarial shedding patterns of various schistosomes species under outdoor conditions in the Transvaal.Ann. Trop. Med. Parasitol. 63:359–371.
Pointier, J. P., and Théron, A. (1979). La schistosomose intestinale dans les forêts marécageuses àPterocarpus de Guadeloupe (Antilles françaises).Ann. Parasitol. 54:43–56.
Théron, A. (1982).Le Compartiment Cercaire dans le Cycle de Schistosoma mansoniSambon, 1907. Ecologie de la transmission Bilharzienne en Guadeloupe, Thèse de Doctorat d'Etat, Université de Perpignan, Perpignan.
Théron, A. (1984). Early and late shedding patterns ofSchistosoma mansoni cercariae: Ecological significance in transmission to human and murine hosts.J. Parasitol. 70:652–655.
Théron, A. (1985). Polymorphisme du rythme d'émission des cercaires deSchistosoma mansoni et ses relations avec l'écologie de la transmission du parasite.Vie Milieu 35:23–31.
Théron, A., and Combes, C. (1983). Analyse génétique du rythme d'émergence des cercaires deSchistosoma mansoni par croisement de souches à pics d'émission précoces ou tardifs.C.R. Acad. Sci. Paris 297:571–574.
Yamaguti, S. H. (1970). On the periodicity of natural emergence of cercariae. In Tandan, B. K. (ed.),H. D. Srisvastava Comm. Vol., pp. 485–492.
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This work received financial support from the UNDP/World Bank/WHO Special Programme for Research and Training in Tropical Diseases and the CNRS.
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Théron, A., Combes, C. Genetic analysis of cercarial emergence rhythms ofSchistosoma mansoni . Behav Genet 18, 201–209 (1988). https://doi.org/10.1007/BF01067842
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DOI: https://doi.org/10.1007/BF01067842