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

Irish Veterinary Journal

Ríona Sayers⁴  Mary Sekiya²  Grace Mulcahy²  Eric Morgan³  Barbara Good¹  Martin Danaher⁵  Andrew Forbes⁶  Yris Bloemhoff⁴ 

[1] Animal and Grassland Research and Innovation Centre, Teagasc, Athenry, Co, Galway, Republic of Ireland;School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Republic of Ireland;School of Biological Sciences, University of Bristol, Woodland Road, Bristol BS8 1UG, UK;Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Moorepark, Fermoy, Co. Cork, Republic of Ireland;Food Safety Department, Food Research Centre, Ashtown, Teagasc, Dublin 15, Republic of Ireland;Merial, 29 Avenue Tony Garnier, Lyon, 69007, France

关键词: Seasonality;    ELISA;    Dairy cows;    Epidemiology;    Fasciola hepatica;   

Others  :  1219596
DOI  :  10.1186/s13620-015-0042-5

 received in 2015-01-20, accepted in 2015-06-15,  发布年份 2015

【 摘 要 】

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.

【 授权许可】

   
2015 Bloemhoff et al.

【 图 表 】

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