Друковані видання. Кафедра паразитології та ветеринарно-санітарної експертизи

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Browsing Друковані видання. Кафедра паразитології та ветеринарно-санітарної експертизи by Subject "dermanisiosis"

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    Effect of Dermanyssus gallinae on zootechnical and productive indicators of farming chicken.
    (2024) Yevstafieva, V. O.; Євстаф’єва, Валентина Олександрівна; Петруненко А. П.
    Results of the study of the impact of ticks on the productive indicators of industrial poultry farming in Ukraine are presented in the article. The spread of parasites that attack poultry leads to significant losses in the poultry industry. Modern technologies of poultry farming create favourable conditions for the rapid spread of dermanisiosis in chickens. Dermanyssus gallinae ticks are among the most dangerous blood-sucking ectoparasites, in addition, they are carriers of dangerous bird infections pathogens. The goal of the work was to establish the effect of D. gallinae parasitism on zootechnical indicators of chickens. The research was carried out on the premicies of the "Poultry Farms of Poltava region" farm in the Poltava district of the Poltava region with the support of the laboratory of parasitology of the Poltava State Agrarian University (Poltava). The results of present study established detrimental impact of D. gallinae parasitism on zootechnical indicators of chickens (total number of birds, survival rate, live weight, livestock losses) during the poultry farming. In particular, under the conditions of contamination of the poultry house, the birds were dying before the age of 59 weeks, and the live weight of chickens with D. gallinae ectoparasites was 32.1% lower during this period compared to the clinically healthy birds. In clinically healthy chickens, live weight gradually increased from 1.4 to 2.2 kg from 15 weeks to 34 weeks. While in birds contaminated with ectoparasites, the weight increased from 1.3 to 1.9 kg during the same period, but gradually decreased from the 34th week to 1.4 kg at the 58th week. The survival rate of tick-contaminated chickens during the experiment decreased to 24.9% (over a period of 58 weeks) and was 73.9% lower than that of clinically healthy chickens aged 58 weeks. It was established that the death rate of chickens under the conditions of D. gallinae tick parasitism was 75.0%, which is 7.2 times higher than that of clinically healthy chickens. The data we obtained prove the relevance of research and development of means of solving the problem of chicken dermanisiosis in Ukraine, given the significant negative impact of ectoparasites D. gallinae on the live weight of chickens, the period of their breeding, and the indicators of their survival rates