Hostname: page-component-848d4c4894-4rdrl Total loading time: 0 Render date: 2024-06-20T11:48:25.886Z Has data issue: false hasContentIssue false
  • English
  • Français

Daily emergence of Schistosoma mansoni and S. haematobium cercariae from naturally infected snails under field conditions

Published online by Cambridge University Press:  12 April 2024

C.T. Wolmarans ,
K.N. de Kock ,
H.D. Strauss  and
M. Bornman
C.T. Wolmarans*
Affiliation:
School of Environmental Sciences and Development, Potchefstroom University for CHE, Private Bag X6001, Potchefstroom 2520, South Africa.
K.N. de Kock
Affiliation:
School of Environmental Sciences and Development, Potchefstroom University for CHE, Private Bag X6001, Potchefstroom 2520, South Africa.
H.D. Strauss
Affiliation:
School of Environmental Sciences and Development, Potchefstroom University for CHE, Private Bag X6001, Potchefstroom 2520, South Africa.
M. Bornman
Affiliation:
School of Environmental Sciences and Development, Potchefstroom University for CHE, Private Bag X6001, Potchefstroom 2520, South Africa.
*
*Author for correspondence Fax: 27 18 299 2370, E-mail: drkctw@puknet.puk.ac.za
Get access Rights & Permissions [Opens in a new window]

Abstract

The daily emergence of Schistosoma mansoni and S. haematobium cercariae was investigated under field conditions. Intermediate host snails of both schistosome species were collected during the rainy season, cold dry season and warm dry season and kept separately in test tubes in habitat water. Shed cercariae were collected from each of the test tubes at two hourly intervals, transferred to Petri dishes and counted. Mice were exposed to these cercariae to establish the identity of the schistosome parasites. Peak shedding for both species was observed at 1100 h during the rainy and warm dry seasons and at 0900 h during the cold dry season. Shedding before 0900 h was found only for S. haematobium in the rainy season while shedding after 1700 h occurred only during this season at both species. Shedding observed during 1900 h observation period was in the low category for both species. No shedding was observed during the 2100 h observation period for any of the species and the investigation was discontinued after this period. Only S. haematobium ova were found in the exposed mice.

Type
Research Article
Information
Journal of Helminthology , Volume 76 , Issue 3 , September 2002 , pp. 273 - 277
Copyright
Copyright © Cambridge University Press 2002

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

Faust, E.C. & Hoffman, W.A. (1934) Studies on schistosomiasis mansoni in Puerto Rico III. Biological studies 1. The extra mammalian phases of the life cycle. Puerto Rico Journal of Public Health and Tropical Medicine 10, 1–47.Google Scholar
Giovannola, A. (1936) Some observations on the emission of cercariae of Schistosoma mansoni (Trematoda: Schistosomatidae) from Australorbis glabratus . Proceedings of the Helminthological Society of Washington 3, 60–61.Google Scholar
Jordan, P. & Webbe, G. (1993) Epidemiology. pp. 87–138 in Jordan, P., Webbe, G. & Sturrock, R.F. (Eds) Human schistosomiasis. Wallingford, UK, CAB International.Google Scholar
Nojima, H. & Sato, A. (1978) The emergence of schistosome cercariae from snails 1. Hourly response of cercarial emergence of Schistosoma mansoni and S. haematobium and effect of light-cut on their emergence. Japanese Journal of Parasitology 27, 197–213.Google Scholar
Pitchford, R.J., Meyling, A.H., Meyling, J. & Du Toit, J.F. (1969) Cercarial shedding patterns of various schistosome species under outdoor conditions in the Transvaal. Annals of Tropical Medicine and Parasitology 63, 359–371.CrossRefGoogle ScholarPubMed
Raymond, K.M. & Probert, A.J. (1987) The effect of light and darkness on the production of cercariae of Schistosoma haematobium from Bulinus globosus . Journal of Helminthology 61, 291–296.CrossRefGoogle ScholarPubMed
Rowan, W.B. (1958) Daily periodicity of Schistosoma mansoni cercariae in Puerto Rican waters. American Journal of Tropical Medicine and Hygiene 7, 374–381.CrossRefGoogle ScholarPubMed
Southgate, V.R., Tchuente, L.A., Theron, A., Jourdane, J., Ly, A., Moncrieff, C.B. & Gryseels, B. (2000) Compatibility of Schistosoma mansoni Cameroon and Biomphalaria pfeifferi Senegal. Parasitology 121, 501–505.CrossRefGoogle ScholarPubMed
Tchuente, L.A., Southgate, V.R., Theron, A., Jourdane, J., Ly, A. & Gryseels, B. (1999) Compatibility of Schistosoma mansoni and Biomphalaria pfeifferi in northern Senegal. Parasitology 118, 595–603.CrossRefGoogle ScholarPubMed