Biomedical and Environmental Thematic Group, Ifakara Health Institute, Ifakara, Tanzania.
Parasit Vectors. 2012 Sep 19;5:204. doi: 10.1186/1756-3305-5-204.
Entomopathogenic fungi, particularly those belonging to the genera Metarhizium and Beauveria have shown great promise as arthropod vector control tools. These agents, however, have not been evaluated against flea vectors of plague.
A 3-h exposure to the fungi coated paper at a concentration of 2 × 108 conidia m-2 infected >90% of flea larvae cadavers in the treatment groups. The infection reduced the survival of larvae that had been exposed to fungus relative to controls. The daily risk of dying was four- and over three-fold greater in larvae exposed to M. anisopliae (HR = 4, p<0.001) and B. bassiana (HR = 3.5, p<0.001) respectively. Both fungi can successfully infect and kill larvae of X. brasiliensis with a pooled median survival time (MST±SE) of 2 ± 0.31 days post-exposure.
These findings justify further research to investigate the bio-control potential of entomopathogenic fungi against fleas.
昆虫病原真菌，特别是那些属于绿僵菌属和白僵菌属的真菌，已显示出作为节肢动物载体控制工具的巨大潜力。然而，这些制剂尚未针对鼠疫跳蚤媒介进行评估。
在浓度为 2×108 个分生孢子 m-2 的真菌涂层纸上暴露 3 小时，处理组中超过 90%的跳蚤幼虫尸体被感染。与对照组相比，感染降低了幼虫的存活率。与对照组相比，暴露于绿僵菌（HR=4，p<0.001）和白僵菌（HR=3.5，p<0.001）的幼虫每天死亡的风险分别高出四倍和三倍以上。这两种真菌都可以成功感染和杀死 X. brasiliensis 的幼虫，暴露后中位生存时间（MST±SE）为 2±0.31 天。
这些发现证明了进一步研究昆虫病原真菌对跳蚤的生物控制潜力是合理的。
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