Systematic Analysis and Epizootological Characteristics of the Pathogens of Helminthiasis of Domestic Chickens in the Mountain-Shirvan Region

The studies were conducted in the Mountain-Shirvan economic region of Azerbaijan, where the poultry industry is developing, private and large poultry farms are being created. The helminth fauna of domestic chickens was systematically studied, the intensity and extensiveness of helminth infection were determined. Coprological examinations were carried out on 2340 heads of domestic chickens, 1450 heads were examined using the full autopsy method. In studies of domestic chickens in the Mountainous Shirvan economic region, 5 species of nematodes, 1 species of trematodes, 1 species of cestodes made up the composition of the helminth fauna. In the economic region, the nematode species found in domestic chickens were classified in 5 genera: Ascaridia galli, Capillaria obsignata, Heterakis gallinarum, Trichostrongylus tenuis, Syngamus trachea. It was found that birds are parasitized by 1 species of cestode - Raillietina tetragona, 1 species of trematode - Echinostoma revolutum. We were the first to find that domestic chickens are parasitized and infested by the nematode helminths Trichostrongylus tenuis and the trematode Echinostoma revolutum. Analysis of the results of the studies shows that in recent years the helminth fauna of domestic chickens has been enriched, the intensity and extensiveness of helminth infestation have increased, and associative infestation with helminths classified by different classes has been tracked. It was found that associative infestation occurs with the participation of 3 or more species of helminths. Of 2340 coprological samples, 1860 were found to have helminth eggs (79.5%). Of 1450 complete autopsies of birds, 1269 (87.5%) were found to have helminths. Helminth invasions in chickens was associative. The most intense causative agents of associative invasion are - raillietina + ascaridia, trichostrongylus + heterakis, ascaridia + trichostrongylus, heterakis + syngamus + trichostrongylus, capillaria + heterakis + syngamus, capillaria + raillietina. Based on the analysis of the intensity of helminth infestation in associative infestations, the dominant species were Heterakis gallinarum, Trichostrongylus tenuis, Ascaridia galli.