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    Determining the Prevalence and Seasonality of Fasciola hepatica in Pasture-based Dairy herds in Ireland using a Bulk Tank Milk ELISA

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    Author
    Bloemhoff, Yris
    Forbes, Andrew
    Danaher, Martin
    Good, Barbara
    Morgan, Eric
    Mulcahy, Grace
    Sekiya, Mary
    Sayers, Riona cc
    Keyword
    Fasciola hepatica,
    Epidemiology
    Dairy cows
    ELISA
    Seasonality
    Date
    09/07/2015
    
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    URI
    http://hdl.handle.net/11019/884
    Citation
    Yris Bloemhoff, Andrew Forbes, Martin Danaher, Barbara Good, Eric Morgan, Grace Mulcahy. Irish Veterinary Journal. 2015, 68(1):16
    Abstract
    Background Fasciola hepatica is a helminth parasite of global importance in livestock, with major economic impact. However information on F. hepatica infections in Irish pasture-based dairy herds is limited. Therefore this study was conducted in order to determine the prevalence, seasonality and management factors associated with F. hepatica. A total of 319 Irish dairy herds were selected for this study. Bulk tank milk (BTM) samples were collected from 290 dairy farms on a quarter year basis, while from a further 29 dairy farms BTM samples were collected on a monthly basis to provide a more detailed pattern of F. hepatica exposure in Irish herds. BTM samples were analysed using a commercially available F. hepatica antibody detection ELISA. Furthermore, within-herd prevalence of F. hepatica was assessed in a subset of these 29 herds (n = 17); both individual serum samples and bulk tank milk samples were collected. Results A within-herd prevalence of ≤ 50 % was found for herds with negative bulk tank milk samples. The mean prevalence of the 290 study herds was 75.4 % (Range 52 %–75.1 %), with the highest prevalence being observed in November (75.1 %). The seasonal pattern of F. hepatica shows elevated antibodies as the grazing season progressed, reaching a peak in January. A significant association was found between F. hepatica and age at first calving. Conclusion This study demonstrates that F. hepatica is present in a large proportion of Irish dairy herds and provides a basis on which control practices, particularly in adult dairy cows, can be reviewed.
    Funder
    Irish Dairy Levy Research Trust; Merial
    ae974a485f413a2113503eed53cd6c53
    http://dx.doi.org/10.1186/s13620-015-0042-5
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    Food Safety
    Teagasc publications in Biomed Central
    Teagasc publications in Biomed Central
    Animal & Bioscience

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