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Cercarial productivity of redial generations in single-miracidium infections of Lymnaea truncatula with Paramphistomum daubneyi or Fasciola hepatica

Published online by Cambridge University Press:  12 April 2024

M. Abrous ,
D. Rondelaud  and
G. Dreyfuss
M. Abrous
Affiliation:
Laboratoire d'Histopathologie Parasitaire, Faculté de Médecine Laboratoire de Parasitologie, Faculté de Pharmacie, 2, rue du Docteur Raymond Marcland, 87025, Limoges Cedex, France
D. Rondelaud*
Affiliation:
Laboratoire d'Histopathologie Parasitaire, Faculté de Médecine
G. Dreyfuss
Affiliation:
Laboratoire de Parasitologie, Faculté de Pharmacie, 2, rue du Docteur Raymond Marcland, 87025, Limoges Cedex, France
*
*Author for correspondence. Fax: 33 5 55 43 58 93 E-mail: rondelaud@pharma.unilim.fr
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Abstract

Single-miracidium infections of Lymnaea truncatula with Paramphistomum daubneyi or with Fasciola hepatica were carried out under laboratory conditions to count free rediae, their germinal embryos, and to determine the cercarial productivity of each redial generation. In snails infected by P. daubneyi, the cercariae were produced by the first (8.7 cercariae per redia) and second (8.9 per redia) generations. At day 63 post-exposure, they corresponded, respectively, to 53.9% and 46.1% of cercariae produced by all rediae. In snails infected by F. hepatica, the majority of cercariae were produced by the R2a group (18.2 cercariae per redia) and corresponded to 66.0% of cercariae produced all rediae. The cercariae produced by the other redial groups were more limited in number: 17.5 per redia in the R1b group (28.7%) and 2.0 per redia in the R2b/R3a group (5.3%). Cercarial productivity of P. daubneyi until day 63 post-exposure was more limited in number than that of F. hepatica: a total of 145 cercariae per snail versus 427 per snail.

Type
Research Article
Information
Journal of Helminthology , Volume 74 , Issue 1 , March 2000 , pp. 1 - 5
Copyright
Copyright © Cambridge University Press 2000

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References

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