69 (5) 334-337

Title: 
A SURVEY OF ANTHELMINTIC RESISTANCE ON BELGIAN HORSE FARMS
Author(s): 
P. Dorny, I. Meijer, K. Smets, J. Vercruysse
Abstract: 

A survey to determine the prevalence of anthelmintic resistance of cyathostomes was carried out on 13 horse farms distributed over five different Belgian provinces. Based on faecal egg count reduction tests, resistance to mebendazole (a benzimidazole) was demonstrated on 12 (92%) of these 13 farms. The efficacy ranged from 0% to 100%. The efficacy of pyrantel could be evaluated on only three farms, where the faecal egg count reduction varied from 83% to 96%, which suggested a reduced efficacy of this drug on one farm. The very high prevalence of mebendazole resistance in this study shows that drugs of the (pro-)benzimidazole family should not be used to control cyathostome infections. This survey also demonstrates that the efficacy of anthelmintics used for cyathostome control programmes on horse farms should be routinely evaluated.

Full text: 
pp 334-337
Original article(s)