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Mihai Cernea, Romeo T. Cristina, Laura C. Stefanut, Luís M. Madeira de Carvalho, Marian A. Taulescu, Vasile Cozma. Screening for anthelmintic resistance in equid strongyles (Nematoda) in Romania. Folia Parasitologica , 62, p. 023, 2015.

Abstract: Resistance to anthelmintic medication of equid strongyles is a worldwide phenomenon and for this reason systematic investigationsof resistant parasite populations are necessary. The purpose of the present study was to investigate the presence anddistribution of equid strongyles resistant to the anthelmintics used in Romania, as well as the pre-treatment and post-treatment prevalence of species of strongylid nematodes. The Faecal Egg Count Reduction Test was performed between 2010 and 2013 on a total number of 588 horses and 23 donkeys from 26 locations (subgroups). Animals of the first group (I) consisting of subgroups no. 1–11 were treated with Albendazole (ABZ), those of the second group (II) consisting of subgroups no. 12–23 with Fenbendazole (FBZ), while Ivermectin(IVM) was used on animals of the third group (III) consisting of subgroups no. 24–26. Resistant strongyles have been found in 82% (average lower limit of the 95% confidence interval, LCL95%, was 65) of the total equids from the group treated with ABZ. In the group of horses treated with FBZ, resistant strongyles were identified in 75% of the subgroups (LCL95% = 44). No resistant strongyles have been identified in IVM-treated horse groups (LCL95% = 98). The pre-treatment prevalence of the species of the Strongylinae
Müller, 1780 was 22%, whereas that with nematodes of the subfamily Cyathostominae Molin, 1861 78%. Post-treatment reduction of strongyline nematodes was observed (5%), which demonstrates the sensitivity of large strongyles to common anthelmintics. The posttreatment prevalence of cyathostomes was of 95%, which proves their resistance, especially to ABZ- and FBZ-based anthelmintics.

Keywords: horse, donkey, Strongylinae, Cyathostominae, benzimidazoles, Ivermectin

URL: http://http://folia.paru.cas.cz/pdfs/fol/2015/01/23.pdf

Posted by Romeo Teodor Cristina

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