고온 스트레스 시 녹차 산물의 급여가 닭의 면역 세포 구성에 미치는 영향

This study was conducted to evaluate the effect of green tea supplement on the CD4 and CD8 T-cells in broiler during heat stress. One hundred twenty 5 weeks old broiler chicken were divided into 4 groups. One group was used as control and other groups were given green tea supplement through feed at the rate of 0.5%, 1.0%, 3.0% for 10 days and then kept under heat stress for 3 days at 35 ℃. CD4 and CD8 T-cells were counted by flow cytometry at 0, 1, and 3 day. It was observed that the level of CD4 T-cell percent has increased from 0 day to 3 day in all the treatment groups. CD8 T-cells have gradually decreased in control. however. in treatment groups it has first decreased in 1 day and then incresed at 3 day. It may be concluded that feed supplement with green tea at the level of 3% is useful to boost immunity during heat stress.