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Volume 15, Number 4—April 2009

Research

Animal Reservoir Hosts and Fish-borne Zoonotic Trematode Infections on Fish Farms, Vietnam

Nguyen Thi Lan AnhComments to Author , Nguyen Thi Phuong, K. Darwin Murrell, Maria Vang Johansen, Anders Dalsgaard, Luong To Thu, Tran Thi Kim Chi, and Stig Milan Thamsborg
Author affiliations: National Institute of Veterinary Research, Hanoi, Vietnam (N.T.L. Anh, N.T. Phuong, L.T. Thu); University of Copenhagen, Copenhagen, Denmark (N.T.L. Anh, D. Murrell, M. Vang Johansen, A. Dalsgaard, S.M. Thamsborg); Research Institute for Aquaculture I, Tu Son, Bắc Ninh, Vietnam (T.T.K. Chi)

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Table 2

Trematode infections in domestic animals, by trematode species, Nghe An Province, Vietnam, November 2005

Animal species Trematode species Prevalence, %* Intensity of adult worms
Mean ± SD† Maximum
Dogs (n = 27) Haplorchis pumilio 92.6 47 ± 83 348
H. taichui 62.9 28 ± 47 160
H. yokogawai 25.9 13 ± 25 69
Haplorchis spp. 62.9 30 ± 41 123
Echinochasmus japonicus 29.6 38 ± 79 231
E. perfoliatus 18.5 3 ± 3 9
Echinostoma cinetorchis 3.7 2 2
Centrocestus formosanus 11.1 16 ± 24 44
Not identified 11.1 10 ± 8 15

All
100
99 ± 201
924
Cats (n = 18) H. pumilio 100 33 ± 62 268
H. taichui 77.8 33 ± 94 357
H. yokogawai 11.1 105 ± 136 201
Haplorchis spp. 77.8 51 ± 135 514
E. perforliatus 5.6 3 3
C. formosanus 5.6 4 4
Not identified 22.2 8 ± 4 10

All
100
112 ± 309
1,340
Pigs (n = 5) H. pumilio 100 5 ± 4 13
H. taichui 60 2 2
H. yokogawai 40 2 2
Haplorchis spp. 100 12 ± 13 29
E. japonicus 60 3 ± 3 6
Not identified 60 13 ± 16 32
All 100 29 ± 32 84

*Based on estimation of worm burdens in animals with positive fecal egg counts.
†SD provided only for trematode species in >1 animal.

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