2008年以来湖北省监测发现较多的发热伴血小板减少综合征病例,主要发病地区位于湖北省东北部大别山和桐柏山地区.本研究旨在了解湖北省麻城市、英山县、随州市、咸宁市和兴山县等发热伴血小板减少综合征发病地区蜱种群构成的地区分布,以及随州市蜱季节密度消长情况,为疾病的防控提供科学依据.采集发病地区的各种蜱,并对这些蜱进行分类鉴定,结果表明,2011年湖北随县长角血蜱的季节消长呈单峰型,五月达到最高为112.5只/旗子/小时,随后逐渐下降；发热伴血小板减少综合征病例实验室检测阳性病例同样呈单峰型,在六月达到最高峰(23例).蜱的季节密度消长与发热伴血小板减少综合征病例紧密相关,推测长角血蜱是主要传播媒介节肢动物之一.%More cases of severe fever with thrombocytopenia syndrome (SFTS) have been reported in Hubei Province since 2008,and the major endemic areas of SFTS are located in Dabie Mountains and Tongbai Mountains of northeast Hubei.To understand the geographical distribution and specific composition of tick populations in SFTS endemic areas,ticks were collected and indentified from Macheng City,Yingshan County,Suizhou City,Xianning City and Xingshan County,and those from Suizhou City were also used for analyzing the seasonal fluctuation of ticks.It has been revealed that Haemaphysalis longicornis showed an unimodal type of seasonal fluctuation in 2011 with peak value of 112.5 ticks/flag/h occurred in May,and then declined gradually.The peak value of SFTS incidence occurred in June (23 cases confirmed by laboratory test),closely following the peak of ticks' seasonal fluctuation,implying the close correlation between ticks' seasonal fluctuation and SFTS incidence.H.longicornis might be the possible vectors.
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