Shedding consistency of strongyle-type eggs in dutch boarding horses

D.D.V. Dopfer, C.M. Kerssens, Y.G.M. Meijer, J.H. Boersema, M. Eysker

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    Faeces of 484 horses were sampled twice with an interval of 6 weeks while anthelmintic therapy was halted. Faecal eggs counts revealed that 267 (55.2%) horses had consistently low numbers of eggs per gram faeces (EPG) (EPG <100 or = 100), 155 (32.0%) horses had consistently high EPGs (EPG > 100). Horses with consistently high EPGs were more often mares with access to pasture, aged less than 6 or more than 23 years, that were dewormed at intervals longer than 6 months, and were treated for the last time more than 3 months before the start of the study. Horses with consistently low EPGs were more often male horses with no or limited access to pasture, that were dewormed at maximally 6-month intervals, and were aged between 6 and 23 years. The results are an indication that some horses have consistently low EPGs and perhaps could be used as non-treated animals in a selective anthelmintic treatment scheme aimed at the prevention of the development of anthelmintic resistance.
    Original languageEnglish
    Pages (from-to)249-258
    JournalVeterinary Parasitology
    Issue number3-4
    Publication statusPublished - 2004


    • anthelmintic resistance
    • nematode infections
    • chemotherapy

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    Dopfer, D. D. V., Kerssens, C. M., Meijer, Y. G. M., Boersema, J. H., & Eysker, M. (2004). Shedding consistency of strongyle-type eggs in dutch boarding horses. Veterinary Parasitology, 124(3-4), 249-258.