Document Type : Original Article
Authors
1 Department of Pathobiology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
2 Department of Internal Medicine and Clinical Pathology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
Abstract
The over-use of anti-parasitic compounds as a method of control has led to insufficient effectiveness and widespread drug resistance worldwide. The aim of this study was to investigate the efficacy of albendazole and levamisole as anti-parasitic agents in a lung worm control program in goat flocks. During 2021 and 2022, a total of 110 goats (age of four months and above) were randomly selected from 11 herds in the north-western region of Iran including Saanen breed (both sexes of the same age). The results indicated that 3.60, 50.80 and 41.90% were respectively infected with Dictyocaulus filaria, Muellerius capillaris and Proto-strongylus rufescens, and generally all the lung parasites in goats of this region were resistant to albendazole and levamisole. Due to clinical importance of D. filaria in goats, the molecular analysis of two samples was also done. Sequencing results showed that the identified parasites were 100% similar to the reference sequences registered in the GenBank®. The results of this research showed low level of these anthelmintics efficacy against Dictyocaulus and Muellerius. Generally, the lung parasites in goats of this region are resistant to albendazole and levamisole. The P. rufescens showed high resistance to these drugs. Totally, it can be concluded that the level of drug resistance varies in different parts of the world; but, the frequencies of drug resistance in different parts of the world are not the same, requiring more studies.
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