Ahmed F E, Mohammed A H
Z Parasitenkd. 1978 Nov 27;57(3):229-36. doi: 10.1007/BF00928036.
Studies were performed on the course of infection, relapse, and immunity to reinfection in 11 young pigeons infected with the avian malaria parasite Haemoproteus columbae Kruse. The prepatent period in our experiments varied between 22 and 37 days. The intensity and length of the initial infection period showed wide variations. During this period an initial periodicity of gametocyte production of about 12 days with peaks at about 6-8 and 18-20 days after patency was observed. The various modes of infection (fly bite, intramuscular, intravenous, or intraperitoneal inoculation of sporozoites) did not influence the intensity of the initial infection. No pathogenicity due to heavy infection with the parasite was observed. There was no periodicity of relapse occurrence, nor any correlation between the frequency of relapse and the intensity of the initial infection, and the phenomenon was not influenced by seasonal changes. Pigeons (Columba livia) that had recovered from previous infections were susceptible to reinfection, whereas pigeons with chronic infection acquired immunity (premunition).
对11只感染禽疟原虫鸽血变原虫（克鲁斯）的幼鸽的感染过程、复发情况以及再次感染的免疫力进行了研究。在我们的实验中，潜伏期在22至37天之间。初始感染期的强度和时长差异很大。在此期间，观察到配子体产生的初始周期约为12天，在感染后约6 - 8天和18 - 20天出现峰值。不同的感染方式（蚊虫叮咬、肌肉注射、静脉注射或腹腔接种子孢子）并不影响初始感染的强度。未观察到因寄生虫重度感染而产生的致病性。复发没有周期性，复发频率与初始感染强度之间也没有任何关联，且该现象不受季节变化影响。先前感染已康复的鸽子（家鸽）易再次感染，而慢性感染的鸽子获得了免疫力（带虫免疫）。
