运用集中度与圆形分布法分析北京市布鲁氏菌病时间分布特征

Analysis of the seasonality characteristics of brucellosis based on concentration degree and circular distribution methods in Beijing

目的了解北京市布鲁氏菌病时间分布特征,为制定防制策略提供依据。方法采用集中度与圆形分布分析方法对北京市2004—2014年布病发病时间分布进行时间聚集性分析。结果 2004—2014年北京市共报告布鲁氏菌病423例。集中度分析结果为M值0.32;圆形分布分析结果为布病发病高峰在5月20日,流行期为2月18日至8月19日。结论布病发病具有一定的季节分布特征,呈现春夏季高发,秋冬季低发的特征。

Objective To explore the seasonal distribution characteristics of Brucellosis in Beijing from 2004 to 2014. Methods Concentration degree and circular distribution methods were used to analyze the seasonal distribution characteristics of Brucellosis incidence in Beijing from 2004 to 2014. Results A total of 423 Brucellosis cases were reported from 2004 to 2014 in Beijing. The onset time mainly concentrated in spring. The M value was 0. 32,showing the seasonal concentration distribution characteristics circular distribution analysis showed that,the peak of Brucellosis was on May 20 and the epidemic period of Brucellosis was from February 18 to August 19. Conclusion The prevalence of brucellosis had certain seasonal distribution,mainly concentrated in spring and summer.