我国间日疟潜伏期的问题,是防治工作中极待解决的问题。自六十年代以来,我国学者曾先后根据流行病学的调查结果报告江苏、河南、辽宁等地有长潜伏期间日疟的存在。但至今尚未通过人工感染实验了解其具体潜伏期之长短。为此,我们于1979～1981年对河南开封地区间日疟的潜伏期,进行了自身感染观察。以阳性蚊直接叮咬自愿者的感染方法,于1979年8月4日先后各以1只阳性按蚊叮咬本文研究者中张、程二同志。张于1980年6月2日发病,距蚊叮咬时间为323天;程于1980年6 The problem of the incubation period of Japanese malaria in China is a problem to be solved in the prevention and control work. Since the 1960s, Chinese scholars have successively reported on the existence of vivax malaria during long incubation periods in Jiangsu, Henan and Liaoning provinces based on the epidemiological findings. But so far no artificial infection experiment to understand the length of its specific incubation period. To this end, we conducted a self-infection observation of the incubation period of Plasmodium vivax in 1979 ~ 1981 in Kaifeng, Henan Province. Positive mosquito bite direct infection method of volunteers, on August 4, 1979 has a positive anopheles mosquito bites the researchers Zhang, Cheng two comrades. Zhang in June 2, 1980 onset, mosquito bites time is 323 days; Cheng in 1980 6