An Epidemiological Investigation of Immunosuppressive Diseases in Chicken Farms in Xihe County
In order to understand the prevalence of immunosuppressive diseases in chickens in Xihe County,an epidemiological survey of three immunosuppressive diseases,infectious chicken Infectious Anemia(CIA),bursal disease(IBD)and avian leukemia(ALV)was conducted in 38 chicken farms in Xihe County.The positive rates of CIA,IBD and ALV-Jantibodies detected by ELISA were 78.13%(750/960),97.42%(832/854)and 11.88%(114/960),respectively.The positive rate of CIA and IBD detected by PCR was 13.01%(139/1 068).The positive rate of IBD was negative(0/1 068).And the positive rate of ALV-p27 detected by ELISA was 3.68%(39/1 068).The investigate results showed that serum antibody positive rate was higher than pathogen positive rate,and the average antibody titer was higher with high antibody positive rate.This study provides a theoretical basis for the prevention and control of immunosuppressive disease of chickens in Xihe County,Gansu province through the epidemiological investigation.
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