Müller-Graf C D, Collins D A, Packer C, Woolhouse M E
Wellcome Trust Center for the Epidemiology of Infectious Disease, Department of Zoology, University of Oxford, UK.
Parasitology. 1997 Dec;115 ( Pt 6):621-7. doi: 10.1017/s0031182097001698.
Infection with Schistosoma mansoni was studied in 5 troops of olive baboons (Papio cynocephalus amubis) in Gombe Stream National Park, Tanzania. Three troops were infected with S. mansoni. An aggregated distribution of parasites was observed among hosts. Troop membership was found to be the most significant factor influencing parasite prevalence. Age and reproductive status had no significant effect, but there was a trend for males to acquire higher levels of infection. However, age-prevalence curves showed a high infection in young baboons declining in the older baboons. Behavioural components of exposure--as measured in water-contact pattern--may be related to parasite burden. A 'peak shift' between infection in different age-classes in the different troops was observed: troops with higher schistosome prevalences displayed an earlier peak in prevalence of infection. The baboon troop with the most contact with people showed highest prevalence of infection possibly due to longer exposure to the parasite than the other troops and/or higher host density.
在坦桑尼亚贡贝溪国家公园，对5群东非狒狒（Papio cynocephalus amubis）进行了曼氏血吸虫感染情况的研究。其中3群感染了曼氏血吸虫。在宿主之间观察到寄生虫的聚集分布。发现群体成员身份是影响寄生虫感染率的最重要因素。年龄和生殖状态没有显著影响，但雄性感染水平有升高的趋势。然而，年龄-感染率曲线显示幼龄狒狒感染率高，老龄狒狒感染率下降。以水接触模式衡量的暴露行为成分可能与寄生虫负荷有关。在不同群体中观察到不同年龄组感染之间的“峰值转移”：血吸虫感染率较高的群体感染率峰值出现得更早。与人类接触最多的狒狒群体感染率最高，这可能是因为与其他群体相比，它们接触寄生虫的时间更长和/或宿主密度更高。
