Añez N
Mem Inst Oswaldo Cruz. 1984 Apr-Jun;79(2):249-55. doi: 10.1590/s0074-02761984000200012.
The pathological effects of Trypanosoma rangeli on Rhodnius prolixus and R. robustus, and the relation of mortality to infection, were studied under laboratory conditions. Frequent observations revealed that when the first instar nymphs of R. prolixus and R. robustus were infected with T. rangeli, survival of the bugs during the stages of development to the adult stage decreased. This decrease was statistically significant when compared with uninfected control-bugs, indicating that T. rangeli is pathogenic for both species of triatomine. In R. prolixus the most affected nymphal stages were the first, second and fifth instars, where a higher mortality was also observed. In R. robustus a progressive increase of the mortality from the first to fifth instars, was observed. The pathogenicity of T. rangeli as measured by overall mortality was the same in R. prolixus and R. robustus. The possible pathogenic mechanism of T. rangeli in triatomine-bugs and its epidemiological implications, are discussed.
在实验室条件下，研究了克氏锥虫对长红猎蝽和粗壮猎蝽的病理影响，以及死亡率与感染之间的关系。频繁观察发现，当长红猎蝽和粗壮猎蝽的一龄若虫感染克氏锥虫时，在发育至成虫阶段的过程中，若虫的存活率降低。与未感染的对照若虫相比，这种降低具有统计学意义，表明克氏锥虫对这两种锥蝽具有致病性。在长红猎蝽中，受影响最大的若虫阶段是一龄、二龄和五龄，这些阶段也观察到较高的死亡率。在粗壮猎蝽中，观察到从一龄到五龄死亡率逐渐增加。以总死亡率衡量，克氏锥虫在长红猎蝽和粗壮猎蝽中的致病性相同。文中还讨论了克氏锥虫在锥蝽若虫中的可能致病机制及其流行病学意义。
