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Transmission of fish-borne zoonotic trematodes (Heterophyidae) to common carp (Cyprinus carpio) is independent of density of fish and trematodes

Published online by Cambridge University Press:  23 January 2013

A.S. Boerlage ,
E.A.M. Graat ,
J.A. Verreth  and
M.C.M. de Jong
A.S. Boerlage
Affiliation:
Quantitative Veterinary Epidemiology Group, Wageningen Institute of Animal Sciences (WIAS), Wageningen University, PO Box 338, 6700 AH, Wageningen, The Netherlands
E.A.M. Graat*
Affiliation:
Quantitative Veterinary Epidemiology Group, Wageningen Institute of Animal Sciences (WIAS), Wageningen University, PO Box 338, 6700 AH, Wageningen, The Netherlands
J.A. Verreth
Affiliation:
Aquaculture and Fisheries Group, Wageningen Institute of Animal Sciences (WIAS), Wageningen University, PO Box 338, 6700 AH, Wageningen, The Netherlands
M.C.M. de Jong
Affiliation:
Quantitative Veterinary Epidemiology Group, Wageningen Institute of Animal Sciences (WIAS), Wageningen University, PO Box 338, 6700 AH, Wageningen, The Netherlands
*
*Fax: +31 317 483962. E-mail: lisette.graat@wur.nl
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Abstract

Fish-borne zoonotic trematodes (FZTs) can cause major human health problems. The aim of this study was to quantify the transmission of parapleurolophocercous cercariae to common carp (Cyprinus carpio) and to study the effect of the density of cercariae and the density of fish on transmission with respect to the volume of water and surface area of the bottom. Fish were kept individually either as controls (n= 91) or were exposed to 250 cercariae in tubes with a volume of 25, 50, 100, 250 or 500 ml water (n= 190) with a surface area of 4, 12, 21, 30 or 49 cm2 (n= 195). The dose to which the fish were exposed was kept constant. Infection occurred in 94–100% of fish, with a mean of 15–18 metacercariae per fish and the proportion of FZTs established at 0.06–0.07 metacercariae per cercariae per fish. Neither the prevalence of infection with FZTs nor the number of metacercariae per fish nor the proportion of FZTs established were significantly associated with differences in the density of cercariae or the density of fish per ml water or per cm2 surface area. Thus, it was concluded that the transmission of cercariae to fish is independent of density.

Type
Research Papers
Information
Journal of Helminthology , Volume 88 , Issue 2 , June 2014 , pp. 183 - 188
Copyright
Copyright © Cambridge University Press 2013 

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