Abstract
BackgroundThere 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.ResultsThe study revealed high efficacy of ivermectin on the 14th day after administration without a shortening of the egg reappearance period.ConclusionThe results indicate that strongyles resistance to ivermectin in Poland is not a serious problem.
Highlights
There are no available studies describing the possible resistance of strongyles to ivermectin in horses in Poland
The aim of the study was the assessment of ivermectin resistance of strongylidae in horses bred in Poland, considering routine horse deworming twice a year using ivermectin, without coproscopy
The analysis of the efficacy of ivermectin on the 14th day after its administration indicated that it was effective in 99.9% (CI = 95%)
Summary
There are no available studies describing the possible resistance of strongyles to ivermectin in horses in Poland. 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. 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. The clinical symptoms associated with a strongyle infection are often non-specific. They include a weight loss, poor quality horse hair, diarrhoea and recurring colic [1, 5]. The migration of the fourth-stage small strongyle larvae (L4) and their
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