日月潭按蚊对间日疟原虫易感性的实验研究

本文报告日月潭按蚊对间日疟原虫易感性的实验观察结果。以8例间日疟患者血离体感染8批日月潭按蚊,其中4批腺感染率达100%,阳性腺指数平均为3.73。原虫在蚊体内发育良好,在感染后第8天卵囊分化,第9天涎腺阳性,其发育速度和分化卵囊体积均和在微小按蚊体内者一致。说明该蚊对间日疟原虫具高度易感性。其自然感染率低主要是偏嗜畜血的习性所致。显然,该蚊在一定条件下可起重要传疟作用,不应忽视。

Study on the Susceptibility of Anopheles jeyporiensis candidiensis to Plasmodium vivax

An experimental investigation was carried out on the susceptibility of Anopheles jeporiensis candidiensis to Plasmodium vivax. Eight lots of the mosquito were fed in vitro on the blood from eight patients with vivax malaria infection. Of the eight lots experimentally infected four had gland infection rate as high as 100% and a mean positive gland index of 3.73. Observation on the development of the parasite in the mosquito showed that it was as favorable a host as An. minimus, oocysts differentiating on the 8th day of infection and sporozoites appearing in the salivary glands on the 9th day. The present study confirmed the high susceptibility of the mosquito to P.vivax, and it became clear that the low rate of natural gland infection of this anopheline mosquito was due largely to it s preference for animal blood. Evidently in certain circumstances it would play an importan role in malaria trausmission and should not be derestimated.