Survey for zoonotic liver and intestinal trematode metacercariae in cultured and wild fish in An Giang Province, Vietnam.
- Author:
Nguyen Diem THU
1
;
Anders DALSGAARD
;
Ly Thi Thanh LOAN
;
K Darwin MURRELL
Author Information
- Publication Type:Original Article ; Research Support, Non-U.S. Gov't
- Keywords: Haplorchis; Procerovum; Opisthtorchis; zoonoses; parasite; trematode; liver fluke; intestinal fluke; metacercaria; aquaculture; wild fish; Vietnam
- MeSH: Animals; Aquaculture; Fish Diseases/*epidemiology/parasitology; Fishes; Intestinal Diseases, Parasitic/epidemiology/parasitology/*veterinary; Liver Diseases, Parasitic/epidemiology/parasitology/*veterinary; Prevalence; Trematoda/growth & development/*isolation & purification; Trematode Infections/epidemiology/parasitology/*veterinary; Vietnam/epidemiology; Zoonoses/*epidemiology/parasitology
- From:The Korean Journal of Parasitology 2007;45(1):45-54
- CountryRepublic of Korea
- Language:English
- Abstract: Although Vietnam has a high risk of fishborne zoonotic trematode (FZT) infections for humans, little information exists on the epidemiology of these infections in the country's fish. Because of the importance of cultured catfish and snakehead production in An Giang province, a major production area in the Mekong Delta of Vietnam, a survey for FZTs was carried out in randomly selected fish farms between June 2005 and March 2006. For comparison, wild fish from the same area were also surveyed. A total of 852 cultured fish from 4 districts were collected and examined by pepsin digestion to determine their FZT infection status. In Tra catfish, the prevalence of all types of metacercariae was 2.6%, of which the prevalence of Haplorchis pumilio was 0.7%. The overall prevalence of metacercariae in wild fish was 30.6%, of which 10.3% harbored zoonotic species: H. pumilio (2.8%) and Procerovum sp. (5.6%). The prevalence of Opisthorchis metacercariae, which were diagnosed as O. viverrini, was 1.9%. No metacercariae were found in cultured snakehead fish, although wild-caught snakehead fish had a FZT prevalence of 10.3%: 5.1% were O. viverrini; 2.6% H. pumilio; and 2.6% were Procerovum sp. These are the first reports of H. pumilio, Procerovum sp., and O. viverrini metacercariae in Vietnamese fish. These results indicate that consumption of improperly prepared fish represents a significant risk of acquiring FZTs in this south Vietnam region.
