title: Prevalence of Fasciola in cattle and of its intermediate host Lymnaea snails in central Vietnam.
abstract: The aims of this study were to investigate the prevalence of natural Fasciola infections in both the definitive hosts (cattle) and the intermediate hosts (Lymnaea snails) in central Vietnam. A total of 1,075 fecal samples, randomly collected from cattle in Binh Dinh, Khanh Hoa, and Phu Yen provinces, were examined for Fasciola eggs by a sedimentation method. The overall prevalence of Fasciola was 45.3 %. A subset of the animals (235) was also screened for antibodies against Fasciola by an enzyme-linked immunosorbent assay. Overall, 46.3 % of these animals were shedding Fasciola eggs while 87.2 % were Fasciola seropositive. A lower prevalence of Fasciola was observed in calves ≤ 2 years of age (37.6 %) compared to that in cattle >2 years of age (53.7 %) (p < 0.05). The prevalence in the rainy season (50.8 %) was significantly different to that in the dry season (38.1 %) (p < 0.05). Of the 3.269 Lymnaea viridis and 1.128 Lymnaea swinhoei examined, 31 (0.95 %) and seven (0.62 %), respectively, were found to be infected with Fasciola. This appears to be the first epidemiological survey of the prevalence of Fasciola in cattle and snails in these three provinces in central Vietnam.
authors.affiliation: Laboratory of Sustainable Environmental Biology, Graduate School of Agricultural Science, Tohoku University, 232-3 Yomogida, Naruko-Onsen, Osaki, Miyagi 989-6711, Japan.
authors.forename: Sam Thi
authors.initials: ST
authors.lastname: Nguyen
authors.forename: Duc Tan
authors.initials: DT
authors.lastname: Nguyen
authors.forename: Thoai
authors.initials: T
authors.lastname: Van Nguyen
authors.forename: Vu Vy
authors.initials: VV
authors.lastname: Huynh
authors.forename: Duc Quyet
authors.initials: DQ
authors.lastname: Le
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Fukuda
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Nakai
mesh_terms: D000367:Age Factors; D000818:Animals; D000909:Antibodies, Helminth / Q000097:blood; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology* / Q000469:parasitology; D003430:Cross-Sectional Studies; D004797:Enzyme-Linked Immunosorbent Assay / Q000662:veterinary; D005209:Fasciola / Q000145:classification / Q000302:isolation & purification / Q000502:physiology*; D005211:Fascioliasis / Q000453:epidemiology / Q000469:parasitology / Q000662:veterinary*; D005243:Feces / Q000469:parasitology; D008195:Lymnaea / Q000469:parasitology*; D010063:Ovum / Q000502:physiology; D010270:Parasite Egg Count / Q000662:veterinary; D015995:Prevalence; D012621:Seasons; D013045:Species Specificity; D014744:Vietnam / Q000453:epidemiology
chemical_list: D000909:Antibodies, Helminth