The prevalence of fish-borne zoonotic trematode (FZT) metacercariae was investigated in fish farmed by rural households in Nghe An Province, located in northern Vietnam. In total, 716 fish, including tilapia (Oreochromis niloticus) and 6 carp species, i.e., grass carp (Ctenopharyngodon idellus), bighead carp (Aristichthys nobilis), mrigal (Cirrhinus mrigala), common carp (Cyprinus carpio), silver carp (Hypophthalmychthys molitrix), and roha (Labeo rohita), collected from 53 fish farms were examined. The overall prevalence of FZT metacercariae was 44.6%, ranging from 12.5% to 61.0% in fish species collected from grow-out ponds, which are the production system for growing fish from fingerling size to market size. The overall prevalence was 43.6% in fingerlings cultured in nurseries, ranging from 7.4% to 62.8% for different fish species. The FZT species recovered were heterophyids and echinostomatids and included Haplorchis pumilio, H. taichui, H. yokogawai, Centrocestus formosanus, Stellantchasmus falcatus, and Echinochasmus japonicus, all of which are intestinal flukes in humans, other mammals, and birds. This is the first report of H. yokogawai and E. japonicus in fish in Vietnam, and the first record for S. falcatus in northern Vietnam. Although a previous cross-sectional survey of the people living in these fish farm households revealed a very low prevalence of FZTs (<1%), our results demonstrate that intestinal flukes are common in farmed fish in this area, suggesting that reservoir hosts such as dogs, cats, and pigs are more important in sustaining the life cycles of these flukes in fish farms than human hosts. This has implications for the effectiveness of control programs focused mainly on treatment of humans.
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April 2008
Research Article|
April 01 2008
Prevalence of Zoonotic Trematodes in Fish from a Vietnamese Fish-Farming Community
Tran T. K. Chi;
Tran T. K. Chi
Research in Aquaculture No. 1, Dinh Bang, Tu Son, Hanoi, Bac Ninh Province, Vietnam. kdmurrell@comcast.net
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Anders Dalsgaard;
Anders Dalsgaard
Research in Aquaculture No. 1, Dinh Bang, Tu Son, Hanoi, Bac Ninh Province, Vietnam. kdmurrell@comcast.net
* Department of Veterinary Pathobiology, Faculty of Life Sciences, University of Copenhagen, Groennegaardsvej 15, DK-1870 Frederiksberg, Denmark
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James F. Turnbull;
James F. Turnbull
Research in Aquaculture No. 1, Dinh Bang, Tu Son, Hanoi, Bac Ninh Province, Vietnam. kdmurrell@comcast.net
† Institute of Aquaculture, Univeristy of Stirling, Stirling, Stirlingshire, FK9 4LK, United Kingdom
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Pham A. Tuan;
Pham A. Tuan
Research in Aquaculture No. 1, Dinh Bang, Tu Son, Hanoi, Bac Ninh Province, Vietnam. kdmurrell@comcast.net
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K. Darwin Murrell
K. Darwin Murrell
Research in Aquaculture No. 1, Dinh Bang, Tu Son, Hanoi, Bac Ninh Province, Vietnam. kdmurrell@comcast.net
* Department of Veterinary Pathobiology, Faculty of Life Sciences, University of Copenhagen, Groennegaardsvej 15, DK-1870 Frederiksberg, Denmark
‡ To whom correspondence should be addressed
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J Parasitol (2008) 94 (2): 423–428.
Citation
Tran T. K. Chi, Anders Dalsgaard, James F. Turnbull, Pham A. Tuan, K. Darwin Murrell; Prevalence of Zoonotic Trematodes in Fish from a Vietnamese Fish-Farming Community. J Parasitol 1 April 2008; 94 (2): 423–428. doi: https://doi.org/10.1645/GE-1389.1
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