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Growth rate of the intermediate snail host Galba truncatula influences redial development of the trematode Fascioloides magna

Published online by Cambridge University Press:  28 May 2013

D. Rondelaud ,
A. Novobilský ,
J. Höglund ,
M. Kašný ,
J. Pankrác ,
P. Vignoles  and
G. Dreyfuss
D. Rondelaud
Affiliation:
INSERM U 1094, Faculties of Medicine and Pharmacy, 87025Limoges, France
A. Novobilský
Affiliation:
Department of Biomedical Sciences and Veterinary Public Health, Section for Parasitology, Swedish University of Agricultural Sciences (SLU), 750 07Uppsala, Sweden
J. Höglund
Affiliation:
Department of Biomedical Sciences and Veterinary Public Health, Section for Parasitology, Swedish University of Agricultural Sciences (SLU), 750 07Uppsala, Sweden
M. Kašný
Affiliation:
Department of Parasitology, Faculty of Science, Charles University, Vinicna 7, 128 44Prague, Czech Republic
J. Pankrác
Affiliation:
Department of Parasitology, Faculty of Science, Charles University, Vinicna 7, 128 44Prague, Czech Republic
P. Vignoles
Affiliation:
INSERM U 1094, Faculties of Medicine and Pharmacy, 87025Limoges, France
G. Dreyfuss*
Affiliation:
INSERM U 1094, Faculties of Medicine and Pharmacy, 87025Limoges, France
*
*Fax: 33.5.55.43.58.63 E-mail: gilles.dreyfuss@unilim.fr
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Abstract

A total of 850 pre-adult Galba truncatula (shell height, 4 mm), originating from four French snail populations differing in shell height at the adult stage (from 6.5 to 12 mm), were individually subjected at 20°C to single-miracidium infections with Fascioloides magna. At day 75 post-exposure, the surviving snails were dissected, and rediae and cercariae were counted. Snail groups differed in shell growth during the experiment: from 1.8 ± 0.4 mm in group A up to 4.0 ± 1.1 mm in group D. The prevalence of F. magna infection, the numbers of free rediae and cercariae significantly increased together with increasing growth of infected snails during the experiment. Group A produced 1–6 first-generation rediae per snail and the mean daughter redia production ranged from 7.5 second-generation rediae (when a single first generation per snail developed) to 2.3 (6 first-generation rediae per snail). In contrast, up to ten first-generation rediae were noted in group D, and each mother redia gave daughter rediae with averages ranging from 1.5 (ten first-generation rediae per snail) to 13 (a single first generation per snail). In conclusion, the development of F. magna in G. truncatula exhibited both inter- and intrapopulation variability, where the development of rediae and cercariae was positively correlated with snail growth.

Type
Research Papers
Information
Journal of Helminthology , Volume 88 , Issue 4 , December 2014 , pp. 427 - 433
Copyright
Copyright © Cambridge University Press 2013 

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