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目的观察帕氏按蚊在当地的生物习性,了解其传播疟疾的作用及能量。方法采用现场调查及实验室相结合的方法,在豫南遂平县境内对帕氏按蚊的生活史周期、季节消长、夜间活动叮人情况、吸人血比率等因素进行调查研究。结果连续5年的研究资料显示:该蚊种仅在丘陵山区存在,5月上旬出现,10月下旬消失,幼虫全年均可见到。第一个生殖营养环为(2.5±0.5)d,全部生活史周期(12.5±1.0)d;夜间叮人5年60夜17只,叮人率仅为0.23,吸人血指数为0.0465,其种群数量、叮人指数、吸人血指数及媒介能量均明显低于当地的中华按蚊;间日疟原虫人工感染3次均未成功。结论帕氏按蚊不是中原传播疟疾的媒介。
Objective To observe the local biological habits of Anopheles pachyrhizi and to understand its role and energy of transmitting malaria. Methods By means of on-the-spot investigation and laboratory analysis, the life cycle history, seasonal fluctuation, the activities of bites in night activities and the rate of inhaled blood were investigated in Suiping County of southern Henan. Results The data of 5 consecutive years showed that the mosquito species existed only in hilly areas, appeared in early May and disappeared in late October, and larvae could be seen all year round. The first reproductive-nutrition ring (2.5 ± 0.5) d, all life cycle (12.5 ± 1.0) d; bite 5 nights and 60 nights at night 17, bite rate was only 0.23, sucking human blood index was 0.0465, The number of population, bite index, blood-sucking index and vector energy were significantly lower than that of the local Chinese Anopheles sinensis. Artificial infection of Plasmodium vivax was unsuccessful for 3 times. Conclusion Anopheles paratilitis is not the medium of malaria transmission in the Central Plains.