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目的了解贵州省B型流感病毒的流行特征和规律,为其预防与控制提供依据。方法采用描述性方法对贵州省2013年4月1日—2016年3月31日B型流感病毒RT-PCR检测结果进行统计。结果贵州省2013—2016年3个监测年度B型流感病毒RT-PCR检测阳性1 904份,其中By系1 215份、Bv系642份,2013年4月—2014年3月、2014年4月—2015年3月2个监测年度B型流感的优势流行株都是By系,而2015年4月—2016年3月是Bv和By系共同流行,流行季节主要在冬春季;B型流感病毒男性检出所占比率较高,占56.83%;15岁以下低年龄组人群B型流感病毒检出数最高(70.80%),而Bv系在0~岁年龄组最高(42.37%),By系在5~岁年龄组最高(35.56%);混合感染病原组合构成主要以By+Bv为主,占67.65%,与B型有关的混合感染数占95.59%。结论贵州省B型流感病毒存在By和Bv两种系别的流行,流行季节为冬春季,男性感染病例多于女性,发病以15岁以下人群为主,加强低年龄群体流感疫苗的接种和监测具有重要意义。
Objective To understand the epidemic characteristics and rules of influenza B virus in Guizhou Province and provide basis for its prevention and control. Methods The descriptive method was used to analyze the RT-PCR results of influenza B virus from April 1, 2013 to March 31, 2016 in Guizhou Province. Results A total of 1 904 positive samples were detected by RT-PCR in Guizhou Province during the three monitoring years from 2013 to 2016. Among them, 1 215 were By-lines, 642 were Bv strains, and April 2013-March 2014, April 2014 - March 2015 The dominant epidemic strains of influenza B in the two monitoring years were all By lines, while the Bv and By lines were co-prevalent from April 2015 to March 2016 and the epidemic season was mainly in winter and spring. Influenza virus type B The detection rate of male was higher (56.83%), while the detection rate of influenza B (70.80%) was the highest in low-age group under 15 years old, while that of Bv was the highest (42.37%) in 0 ~ age group (35.56%) in the 5 ~ age group. The composition of mixed infectious pathogens was mainly By + Bv, accounting for 67.65%, and the number of mixed infections associated with type B was 95.59%. Conclusions There is a prevalence of By and Bv in Guizhou province. The prevalence season is winter and spring. There are more male infections than females, and the incidence is less than 15 years old, and the inoculation and monitoring of flu vaccines of low-age groups are strengthened It is of great significance.