Foodborne Trematode Metacercariae in Fish from Northern Vietnam and Their Adults Recovered from Experimental Hamsters

Tháng Mười 11, 2017

Foodborne Trematode Metacercariae in Fish from
Northern Vietnam and Their Adults Recovered from
Experimental Hamsters

Jong-Yil Chai1, Nguyen Van De2 and Woon-Mok Sohn3,*
1Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, and Institute of Endemic Diseases, Seoul National
University Medical Research Center, Seoul 110-799, Korea;
2Department of Parasitology, Hanoi Medical University, Hanoi, Vietnam; 3Department of
Parasitology and Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju 660-751, Korea

Abstract: The prevalence of foodborne trematode (FBT) metacercariae was investigated in fsh from 2 localities of northern Vietnam in 2004-2005. Freshwater fsh (9 species) were collected from local markets in Hanoi City (n=76) and Nam
Dinh Province (n=79), and were examined for FBT metacercariae using the artifcial digestion technique. Adult flukes
were obtained from hamsters experimentally infected with the metacercariae at day 8 post-infection. Three (
Haplorchis
pumilio, Centrocestus formosanus,
and Procerovum varium) and 6 (Haplorchis taichui, H. pumilio, C. formosanus, P. varium, Stellantchasmus falcatus, and Heterophyopsis continua) species of FBT metacercariae were detected in the 2 regions, respectively. Overall, H. pumilio metacercariae were detected in 104 (80.0%) of 130 fsh examined (metacercarial
density per infected fsh; 64.2).
C. formosanus metacercariae were found in 37 (40.2%) of 92 fsh (metacercarial density;
14.7).
P. varium metacercariae were detected in 19 (63.3%) of 30 fsh (Anabas testudineus and Mugil cephalus) (metacercarial density; 247.7). S. falcatus metacercariae were found in all 10 M. cephalus examined (metacercarial density; 84.4).
H. continua metacercariae (2 in number) were detected in 1 fsh of Coilia lindmani. Morphologic characteristics of the FBT
metacercariae and their experimentally obtained adults were described. The results have demonstrated that various FBT
species are prevalent in northen parts of Vietnam.
Key words: Haplorchis taichui, Haplorchis pumilio, Centrocestus formosanus, Procerovum varium, Stellantchasmus falcatus, Heterophyopsis continua,
foodborne trematode, metacercaria, fsh, Vietnam

https://drive.google.com/file/d/0BwAVbkCHjoJ8TVd6eVFtVXotMjA/view?usp=sharing