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.
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Acknowledgments
Our thanks are due to Novartis, Pty., Ltd. Australia for their generous donation of the triclabendazole used in this study and to Mr. G Anderson for the statistical analyses. We are grateful to farmers at Le Loi commune, Thuong Tin district and at Cao Duong commune, Thanh Oai district for their participation in the study. Funds from the Agricultural Development Agency of the US Embassy, Hanoi, were used for the conduct of the study.
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The authors have no conflicts of interest concerning the work reported in this paper.
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Lan Anh, N.T., Thanh, D.T.H., Hoan, D.H. et al. The transmission of Fasciola spp. to cattle and contamination of grazing areas with Fasciola eggs in the Red River Delta region of Vietnam. Trop Anim Health Prod 46, 691–696 (2014). https://doi.org/10.1007/s11250-014-0542-4
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DOI: https://doi.org/10.1007/s11250-014-0542-4