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Compatibility of Schistosoma mansoni Cameroon and Biomphalaria pfeifferi Senegal

Published online by Cambridge University Press:  02 January 2001

V. R. SOUTHGATE ,
L. A. TCHUEM TCHUENTÉ ,
A. THÉRON ,
J. JOURDANE ,
A. LY ,
C. B. MONCRIEFF  and
B. GRYSEELS
V. R. SOUTHGATE
Affiliation:
Biomedical Sciences Theme, Department of Zoology, The Natural History Museum, Cromwell Road, South Kensington, London SW7 5BD, UK
L. A. TCHUEM TCHUENTÉ
Affiliation:
Biomedical Sciences Theme, Department of Zoology, The Natural History Museum, Cromwell Road, South Kensington, London SW7 5BD, UK Institute of Tropical Medicine, Nationalestraat 155, 2000 Antwerp, Belgium Laboratoire de Biologie Générale, Faculté des Sciences, Université de Yaoundé I, B.P. 812 Yaoundé, Cameroun
A. THÉRON
Affiliation:
Laboratoire de Biologie Animale, UMR no. 5555 du CNRS, Centre de Biologie et d'Ecologie Tropicale et Méditerranéenne, Université de Perpignan, Avenue de Villeneuve, 66860 Perpignan Cedex, France
J. JOURDANE
Affiliation:
Laboratoire de Biologie Animale, UMR no. 5555 du CNRS, Centre de Biologie et d'Ecologie Tropicale et Méditerranéenne, Université de Perpignan, Avenue de Villeneuve, 66860 Perpignan Cedex, France
A. LY
Affiliation:
Programme Espoir, Région Médicale de St Louis, B.P. 394 St Louis, Sénégal
C. B. MONCRIEFF
Affiliation:
Biomedical Sciences Theme, Department of Zoology, The Natural History Museum, Cromwell Road, South Kensington, London SW7 5BD, UK
B. GRYSEELS
Affiliation:
Institute of Tropical Medicine, Nationalestraat 155, 2000 Antwerp, Belgium
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Abstract

The vectorial capacity of Biomphalaria pfeifferi from Ndiangue, Senegal, was investigated with an allopatric isolate of Schistosoma mansoni from Nkolbisson, Cameroon. The snail infection rate after exposure to a single miracidium per snail (MD1) was 56·3%, and 91·6% for snails exposed to 5 miracidia per snail (MD5). The minimum pre-patent period was 21 days. The mean total cercarial production for the MD1 group was 18511 cercariae per snail, and 9757 cercariae for the MD5 group. The maximum production of cercariae for 1 day was 4892 observed in a snail from the MD1 group at day 43 post-infection. The mean longevity of snails was higher in group MD1 (88 days p.i.) than in group MD5 (65 days p.i.). The chronobiological emergence pattern revealed a circadian rhythm with one shedding peak at mid-day. Comparisons are made with the vectorial capacity of the sympatric combination of B. pfeifferi Senegal/S. mansoni Senegal.

Keywords

Schistosoma mansoni CameroonBiomphalaria pfeifferi Senegalchronobiologysnail–parasite compatibility
Type
Research Article
Information
Parasitology , Volume 121 , Issue 5 , November 2000 , pp. 501 - 505
Copyright
2000 Cambridge University Press

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