北京昌平区疾控中心昨日确认，回龙观龙泽苑西区出现蜱虫，一名居民和多只宠物狗被叮咬。回龙观地区办事处和物业已展开全面排查、监控、宣传和消杀工作。市卫生局和昌平区疾控中心表示，被叮咬者没有发病。北京加强对于可能出现的疫情监测，各医疗机构一旦发现“蜱虫病”24小时内上报。

蜱也叫壁虱，俗称草扒子、狗鳖、草别子、牛虱等。蛰伏在浅山丘陵的草丛、植物上，或寄宿于牲畜等动物皮毛。蜱是许多种脊椎动物体表的暂时性寄生虫，是一些人兽共患病传播媒介和贮存宿主。蜱虫虽小毒性惊人，一被叮咬轻则重病，重则送命。

我们来看相关英文报道：
The disease control center in suburban Changping district on Tuesday started all-round disinfections in a community where a resident and some pets were suspected of being bitten by ticks last week.

The woman, surnamed Li, who lives in Longzeyuan community of Changping district, said she was stung by a bug on her right shoulder several days ago and then felt an itch and had small blood spots all over her body, which made her suspect it was a tick.

上周北京小区居民和一些宠物怀疑被蜱虫叮咬，周二，北京昌平区疾病控制中心开始在该小区全面消毒。家住昌平区龙泽苑小区的李女士说，她在几天前右胳膊被虫子叮咬，之后感到痒，全身起小血点，她怀疑是蜱虫。

【讲解】文中的tick即指蜱（pí）虫，tick一般指（钟表等的）滴答声，如Life is short.Tick tock, tick tick. 人生苦短，光阴似箭。蜱虫是许多种脊椎动物体表的暂时性寄生虫，是一些人兽共患病的传播媒介和贮存宿主。被蜱虫叮咬后临床病例多表现为发热伴白细胞（white blood cell）、血小板（platelet）数目减少，目前一些病例被诊断为人粒细胞无形体病human granulocytic anaplasmosis (HGA)。