试验的结果如下: 1.一名从未患过疟疾的健康受试者,在421天内间隔不同时间,先后受严重感染缅甸(Thau)株(抗4—氨基喹啉和乙胺嘧啶)恶性疟原虫子孢子经X线平均剂量17,500拉德照射过的按蚊叮咬13次,共接受减弱的子孢子1,441个。在第98天和327天,这个受试者和几个未免疫的对照者同时受感染同株 The results of the trial were as follows: 1. A healthy volunteer who had never had malaria was subjected to severe infections of the Thau strain (anti-4-aminoquinolines and pyrimethamine) falciparum malaria at various times within 421 days, Protozoal spores were anaerobically bred 13 times with an average dose of 17,500 rads and received 1,441 attenuated sporozoites. At day 98 and day 327, this subject and several non-immunized controls were both infected with the same strain