title: The transmission of Fasciola spp. to cattle and contamination of grazing areas with Fasciola eggs in the Red River Delta region of Vietnam.
abstract: At four times during November 2010, cattle with infections of Fasciola spp., in two communes of northern Vietnam, were allocated to two equivalent groups. Cattle in one group were treated with triclabendazole. Faecal samples collected monthly from both groups were tested for Fasciola copro-antigens and the presence of Fasciola eggs. Re-infection of treated cattle occurred from early March to late November, coinciding with high weekly totals of rainfall. Contamination of grazing areas by untreated cattle was high and relatively constant throughout the year. However, contamination was reduced to undetectable amounts for 8 to 12 weeks after treatment and even at 20 weeks was only 50% or less of the pre-treatment amounts. Therefore, treatments given in mid-September and again in early April, at the start of the wet season, may be sufficient to prevent contamination of grazing areas and reduce the prevalence and severity of Fasciola infections in cattle.
authors: National Institute of Veterinary Research, 86, Truong Chinh, Dong Da, Hanoi, Vietnam, lananhnivr@yahoo.com.vn.
authors: Nguyen Thi
authors: NT
authors: Lan Anh
authors: Dao Thi Ha
authors: DT
authors: Thanh
authors: Doan Huu
authors: DH
authors: Hoan
authors: Do Thu
authors: do T
authors: Thuy
authors: Nguyen Viet
authors: NV
authors: Khong
authors: Norman
authors: N
authors: Anderson
mesh_terms: D000818:Animals; D000871:Anthelmintics / Q000008:administration & dosage; D001562:Benzimidazoles / Q000008:administration & dosage; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology / Q000469:parasitology / Q000517:prevention & control* / Q000635:transmission; D005209:Fasciola / Q000502:physiology*; D005211:Fascioliasis / Q000453:epidemiology / Q000517:prevention & control / Q000635:transmission / Q000662:veterinary*; D005243:Feces / Q000469:parasitology; D005260:Female; D010063:Ovum; D010270:Parasite Egg Count / Q000662:veterinary; D015995:Prevalence; D011891:Rain; D012307:Risk Factors; D012621:Seasons; D013696:Temperature; D000077682:Triclabendazole; D014744:Vietnam / Q000453:epidemiology
chemical_list: D000871:Anthelmintics; D001562:Benzimidazoles; D000077682:Triclabendazole