Freshwater aquaculture nurseries and infection of fish with zoonotic trematodes, Vietnam

Phan Thi Van; Annette Kjær Ersbøll; Thanh Thi Nguyen; Khue Viet Nguyen; Ha Thi Nguyen; Kenneth Darwin Murrell; Anders Dalsgaard

doi:10.3201/eid1612.100422

Freshwater aquaculture nurseries and infection of fish with zoonotic trematodes, Vietnam

Phan Thi Van, Annette Kjær Ersbøll, Thanh Thi Nguyen, Khue Viet Nguyen, Ha Thi Nguyen, Kenneth Darwin Murrell, Anders Dalsgaard

45 Citationer (Scopus)

Abstract

Residents of the Red River Delta region of northern Vietnam have a long tradition of eating raw fish. Fish-borne zoonotic trematodes (FZTs) are estimated to infect ≈1 million persons in Vietnam. It remains uncertain at what stages in the aquaculture production cycle fish become infected with FZTs. Newly hatched fish (fry) from 8 hatcheries and juveniles from 27 nurseries were therefore examined for FZT infection. No FZTs were found in fry from hatcheries. In nurseries, FZT prevalence in juveniles was 14.1%, 48.6%, and 57.8% after 1 week, 4 weeks, and when overwintered in ponds, respectively. FZT prevalence was higher in grass carp (p<0.001) than in other carp species. Results show that nurseries are hot spots for FZT infections in fish. Thus, sustainable FZT prevention strategies must address aquaculture management practices, particularly in nurseries, to minimize the risk of distributing infected juveniles to grow out ponds and, subsequently, to markets for human consumption.

Originalsprog	Engelsk
Tidsskrift	Emerging Infectious Diseases (Print Edition)
Vol/bind	16
Udgave nummer	12
Sider (fra-til)	1905-1909
Antal sider	5
ISSN	1080-6040
DOI	https://doi.org/10.3201/eid1612.100422
Status	Udgivet - dec. 2010

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10.3201/eid1612.100422

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title = "Freshwater aquaculture nurseries and infection of fish with zoonotic trematodes, Vietnam",

abstract = "Residents of the Red River Delta region of northern Vietnam have a long tradition of eating raw fish. Fish-borne zoonotic trematodes (FZTs) are estimated to infect ≈1 million persons in Vietnam. It remains uncertain at what stages in the aquaculture production cycle fish become infected with FZTs. Newly hatched fish (fry) from 8 hatcheries and juveniles from 27 nurseries were therefore examined for FZT infection. No FZTs were found in fry from hatcheries. In nurseries, FZT prevalence in juveniles was 14.1%, 48.6%, and 57.8% after 1 week, 4 weeks, and when overwintered in ponds, respectively. FZT prevalence was higher in grass carp (p<0.001) than in other carp species. Results show that nurseries are hot spots for FZT infections in fish. Thus, sustainable FZT prevention strategies must address aquaculture management practices, particularly in nurseries, to minimize the risk of distributing infected juveniles to grow out ponds and, subsequently, to markets for human consumption.",

author = "Van, {Phan Thi} and Ersb{\o}ll, {Annette Kj{\ae}r} and Nguyen, {Thanh Thi} and Nguyen, {Khue Viet} and Nguyen, {Ha Thi} and Murrell, {Kenneth Darwin} and Anders Dalsgaard",

year = "2010",

month = dec,

doi = "10.3201/eid1612.100422",

language = "English",

volume = "16",

pages = "1905--1909",

journal = "Emerging Infectious Diseases",

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publisher = "CDC Centers for Disease Control and Prevention",

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TY - JOUR

T1 - Freshwater aquaculture nurseries and infection of fish with zoonotic trematodes, Vietnam

AU - Van, Phan Thi

AU - Ersbøll, Annette Kjær

AU - Nguyen, Thanh Thi

AU - Nguyen, Khue Viet

AU - Nguyen, Ha Thi

AU - Murrell, Kenneth Darwin

AU - Dalsgaard, Anders

PY - 2010/12

Y1 - 2010/12

N2 - Residents of the Red River Delta region of northern Vietnam have a long tradition of eating raw fish. Fish-borne zoonotic trematodes (FZTs) are estimated to infect ≈1 million persons in Vietnam. It remains uncertain at what stages in the aquaculture production cycle fish become infected with FZTs. Newly hatched fish (fry) from 8 hatcheries and juveniles from 27 nurseries were therefore examined for FZT infection. No FZTs were found in fry from hatcheries. In nurseries, FZT prevalence in juveniles was 14.1%, 48.6%, and 57.8% after 1 week, 4 weeks, and when overwintered in ponds, respectively. FZT prevalence was higher in grass carp (p<0.001) than in other carp species. Results show that nurseries are hot spots for FZT infections in fish. Thus, sustainable FZT prevention strategies must address aquaculture management practices, particularly in nurseries, to minimize the risk of distributing infected juveniles to grow out ponds and, subsequently, to markets for human consumption.

AB - Residents of the Red River Delta region of northern Vietnam have a long tradition of eating raw fish. Fish-borne zoonotic trematodes (FZTs) are estimated to infect ≈1 million persons in Vietnam. It remains uncertain at what stages in the aquaculture production cycle fish become infected with FZTs. Newly hatched fish (fry) from 8 hatcheries and juveniles from 27 nurseries were therefore examined for FZT infection. No FZTs were found in fry from hatcheries. In nurseries, FZT prevalence in juveniles was 14.1%, 48.6%, and 57.8% after 1 week, 4 weeks, and when overwintered in ponds, respectively. FZT prevalence was higher in grass carp (p<0.001) than in other carp species. Results show that nurseries are hot spots for FZT infections in fish. Thus, sustainable FZT prevention strategies must address aquaculture management practices, particularly in nurseries, to minimize the risk of distributing infected juveniles to grow out ponds and, subsequently, to markets for human consumption.

U2 - 10.3201/eid1612.100422

DO - 10.3201/eid1612.100422

M3 - Journal article

C2 - 21122220

SN - 1080-6040

VL - 16

SP - 1905

EP - 1909

JO - Emerging Infectious Diseases

JF - Emerging Infectious Diseases

IS - 12

ER -

Freshwater aquaculture nurseries and infection of fish with zoonotic trematodes, Vietnam

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