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Searching for ivermectin resistance in a Strongylidae population of horses stabled in Poland
A Zak1, N Siwinska2, M Slowikowska2
1Department of Internal Medicine and Clinic of Diseases of Horses, Dogs and Cats, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, pl. Grunwaldzki 47, 50-366, Wroclaw, Poland. agnieszka.zak@up.wroc.pl.
Background:
There are no available studies describing the possible resistance of strongyles to ivermectin in horses in Poland. One hundred seventy three horses from nine stud farms from South-Western Poland were studied. The effectiveness of ivermectin was studied on the 14th day after ivermectin administration using the fecal egg count reduction test, and a long-term observation of the egg reappearance period was carried out. The fecal study was carried out using a modified McMaster method, which typically detects 20 eggs per gram of stool. The results were subjected to statistical analysis that enabled quantification of the eggs in the stool samples.
Results:
The study revealed high efficacy of ivermectin on the 14th day after administration without a shortening of the egg reappearance period.
Conclusion:
The results indicate that strongyles resistance to ivermectin in Poland is not a serious problem.
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