【摘要】 1992年2月和3月,在长沙一鸡场发生小鸡伪劣氯霉素中毒症,发病率为33%～42.9%,死亡率为17.1%～26.1%.病鸡临床表现发呆、沉郁,两脚无力,步态不稳.临死前出现痉挛、角弓反张和昏迷.病理变化主要是:大脑皮质微软化灶,肝坏死灶,胆囊肿大,肾淤血,变性及坏死,卡他性肠炎等.用小鸡人工复制试验成功,饲喂伪劣氯霉素的小鸡死亡.更多还原

【Abstract】 In February and March, 1992, there were two outbreaks of medicine toxicosis in chicks, caused by a false chloramphenicol in a poultry farm in Changsha, Hunan.The morbidity rate was 33%～42.9% and mortality 17.1%～26.1%. The clinical signs consisted of lethargy, listlessness, and weakness and showed signs of ataxia and a stilted gait. Convulsious, opisthotonus and coma preceded death. The postmortem and histo-pathological findings occurred mainly in the brain, liver, gallbladder, kidney and intestines. Those principal lesions were small softening foci in cerelral cortex, necrotic hepatitis, swollen gallbladder, venous hyperemia, degeneration and necrosis in kidney, and caterrhal enteritis etc. Artificial infection of chicks was performed. Feeding of the false medicine to chicks, caused 93%～100% mortality in 9 days, but no deaths occurred in the control groups.更多还原