[目的] 观察"复方板蓝根制剂"治疗自然感染鸡传染性支气管炎的效果.[方法] 采用0.33‰、0.67‰和1.33‰ 3种不同浓度的"复方板蓝根制剂"饲喂病鸡,对7 340只自然发病鸡进行治疗,观察该药的治疗效果.[结果] 根据流行病学调查、临床症状鉴别、病理剖检变化和实验室检查确诊2个鸡场的7 340只病鸡所患疾病为鸡传染性支气管炎.病鸡服用"复方板蓝根制剂"后病情很快得到控制,未经治疗的对照组自愈率为85.18%,症状恢复缓慢;3个"复方板蓝根制剂"组的治愈率均在97%以上,病死率显著低于对照组,且症状恢复较快;0.33‰"复方板蓝根制剂"组与病毒灵组疗效相当;0.67‰和1.33‰剂量治疗组治愈率显著高于0.33‰剂量组与病毒灵治疗组.[结论] "复方板蓝根制剂"可有效治疗自然感染发病的鸡传染性支气管炎,推荐剂量为0.67‰.%[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 ‰.
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