SICAKLIK STRESİNİN BROYLER PİLİÇLERİN HUMORAL BAĞIŞIKLIKLARI ÜZERİNE ETKİSİ

Abstract

In this study, the elfect ol heat stress on humoral immunity against Newcastle (ND) and Inleclious Bronchitis (IB) antigens was determined in broiler chicken after vaccination ol ND and IB. Totally, 40 broiler chicks were divided into 2 groups as experimental and controL. The broilers were mucosally and orally vaccinated with ND and IB vaccines at 1 and 17 days, respectively. Then they were treated at 38-39°C ol heat stress between 15th and 30th days. Blood samples were collected Irom experimental groups at 10 days intervals, after vaccinalion. The titres ol antibodies were determined against ND by Haemagglutination-Inhibition (HI) test and IB by ELISA. Decreased titres of antibodies against ND and IB antigens at 40 days samples were statistically lound to be important in animals treated heat stress than controls.