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目的明确三江源自然保护区当前布鲁氏菌病(简称布病)疫情现况及特征。方法在保护区范围内抽取不少于8个县,调查总人数不低于4 800人,进行布病流行病学调查和实验室检测。结果本次共调查6 310人,布病感染率2.23%,患病率0.63%,从2例新发病例全血样本中分离到2株羊3型布鲁氏菌。疫区流行特性呈现为疫情流行强度较低,地区分布广泛;在人群分布中呈现职业性或与家畜接触机会性特点,病例呈散发分布,未发现聚集性病例。结论当前三江源自然保护区布病疫情已突破此前达到的国家控制区标准,流行菌株为羊3型布氏菌,疫情回升态势初显,与目前国内疫情无明显的关联性。
Objective To clarify the current status and characteristics of the current brucellosis (the brucellosis) in Sanjiangyuan Nature Reserve. Methods No less than 8 counties were sampled within the protected area and the total number of people surveyed was not less than 4,800. Epidemiological investigation and lab tests of brucellosis were conducted. Results A total of 6 310 people were investigated. The prevalence of brucellosis was 2.23% and the prevalence was 0.63%. Two strains of Brucella brucei 3 were isolated from 2 newly diagnosed whole blood samples. Epidemic epidemic characteristics of epidemic situation showed low intensity epidemic, the region is widely distributed; in the distribution of the population showed occupation or contact with livestock opportunistic characteristics, the cases were distributed, no cases of aggregation were found. Conclusion The prevalence of brucellosis in Sanjiangyuan Nature Reserve has exceeded the previously reached national control area standard. The epidemic strain is Brucella 3-type sheep, and the upward trend of the epidemic is obvious. It has no obvious correlation with the current domestic epidemic situation.