Epidemiological Investigation of Avian Leucosis in LargeScale Chicken Farms in Tianshui City

Abstract:

In order to understand the prevalence of Avian Leucosis in Tianshui City, Gansu Province, this paper used realtime fluorescent PCR method to carry out pathogenic detection on 480 cloacal swabs collected from 24 largescale chicken farms from 2020 to 2021. The results showed that 18 of the 24 scale farms were positive, with a positive rate of 73.33%. Among the 480 samples, 203 were positive, and the positive rate of the samples was 42.29%. Among them, the infection rate of Avian Leucosis for different purposes is different. Among the 360 laying hen samples, 138 were positive, and the positive rate was 38.33%. Among the 120 broiler samples, 65 were positive, with a positive rate of 54.17%. The results showed that Avian Leucosis virus was prevalent in largescale chicken farms in Tianshui City, and the infection rate of broiler chickens was higher than that of laying hens.