Effect of Compound Chinese Medicine——Banlangen on the Treatment of Avian Infectious Bronchitis of Chicken

[Objective] The effect of the compound Chinese medicine——Banlangen on the prevention of chicken avian infectious bronchitis naturally infected was experimented.[Method] The ill chickens were fed with the Banlangen with 3 different concentrations of 0.33 ‰,0.67 ‰ and 1.33 ‰.The efficiency on total of 7 340 chickens treated with the method was observed.[Results] 7 340 chickens in two chicken farms were confirmed to be infected by the avian infectious bronchitis disease according to the epidemiological investigation,the identification of clinical symptoms,the pathological change in autopsy and laboratory test.The disease of treated chickens was under control soon and the recovery rate of untreated chicken(CK)was 85.18%,which recovery speed was relevant slow.The recovery rate of 3 treatments was over 97% with fast recovery speed and significantly lower rate of dead chicken than the CK.The treatment of Banlangen with 0.33 ‰ was with same efficiency as the treatment of other chemical——Bingtuling.The efficiency of the treatment of Banlangen with 0.67 ‰ and 1.33 ‰ was significantly better than these of 0.33 ‰ and Bingtuling.[Conclusion] The compound Chinese medicine——Banlangen had the effect on the prevention of chicken avian infectious bronchitis naturally infected and the recommended dose was 0.67 ‰.