铃头血蜱是一种三宿主蜱,主要宿主为犬。当寄生数量多时,不仅可引起宿主严重贫血,甚至可造成死亡。1963年我校某附属医院动物室饲养的狗群,曾一度受到铃头血蜱的严重侵袭,有的狗身上寄生的蜱数,一周内可近千只,以致死亡现象不断发生,而且还自该蜱体内分离出Q热病原体;狗群中Q热血清补体结合试验阳性率高达77.8％。 Bellhead tick is a three host tick, the main host for dogs. When the number of parasites is high, it can not only cause severe anemia in the host, but also cause death. In 1963, the dog population kept in the animal room of a certain affiliated hospital of our university was once severely attacked by tick-head ticks. Some of the ticks parasitized by some dogs in the hospital could reach nearly 1000 in a week, resulting in the continuous death and self-inflicted The ticks were isolated Q fever pathogens; Q group in the serum Q positive serum complement fixation test up to 77.8%.