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首页> 外文期刊>Applied Microbiology >Assessment of Survival and Body Size Variation of Culicoides imicola (Diptera: Ceratopogonidae) as Functions of “Candidatus Cardinium” (Bacteroidetes) Infection Status
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Assessment of Survival and Body Size Variation of Culicoides imicola (Diptera: Ceratopogonidae) as Functions of “Candidatus Cardinium” (Bacteroidetes) Infection Status

机译：评估Culicoides imicola（Diptera：Ceratopogonidae）的生存和体型变化与“ Candidatus Cardinium”（拟杆菌）感染状况的关系

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“ Candidatus Cardinium hertigii” ( Bacteroidetes ) is a maternally inherited endosymbiont known from several arthropods. Its mechanisms for persistence in host populations are mostly reproductive manipulation, though it has been occasionally reported to improve fitness parameters in several hosts. In Culicoides (Diptera: Ceratopogonidae) biting midges, the prevalence of “ Candidatus Cardinium” infection was documented as moderate, with no detectable sex bias. We therefore investigated whether “ Candidatus Cardinium” affects important fitness parameters, such as survival and body size, in Culicoides imicola , a dominant vector species. Field-collected midges were trapped and analyzed for survival under different environmental conditions and antibiotic treatment, taking into account “ Candidatus Cardinium” infection status and parity status (i.e., parous or nulliparous). Additionally, wing lengths were measured as a proxy parameter for body size and analyzed together with “ Candidatus Cardinium” infection data. The findings revealed no difference in survival of Culicoides infected with “ Candidatus Cardinium” and that of uninfected midges in both parity states and under all tested conditions: optimal, starvation, heat, and antibiotic treatment. Beyond survival, no wing length difference was found for “ Candidatus Cardinium”-infected versus uninfected midges. In aggregate, these findings support our conclusion that “ Candidatus Cardinium” does not have an overt effect on the survival and size of adult C. imicola midges. “ Candidatus Cardinium” may affect immature stages or may alter adult reproductive performance.
机译：“假丝酵母念珠菌”（拟杆菌）是母本遗传的内共生体，从几种节肢动物中已知。它在寄主种群中的持久性机制主要是生殖操纵，尽管据报道偶尔会改善一些寄主的适应性参数。在库蚊（Diptera：Ceratopogonidae）的叮咬ges中，“卡迪达斯卡丁虫”感染的发生率中等，没有性别偏见。因此，我们调查了“ Candidatus Cardinium”是否影响重要的适应种Culicoides imicola的重要适应性参数，例如存活率和体型。捕获田间采集的ges，并在不同环境条件和抗生素治疗下进行存活分析，同时考虑“念珠菌”感染状况和奇偶性状况（即胎生或胎生）。此外，机翼的长度作为衡量体型的代用参数进行了测量，并与“ Candidatus Cardinium”感染数据一起进行了分析。研究结果表明，在“奇偶性”状态和所有测试条件下，被“念珠菌”感染的Culicoides和未感染的蚊的存活率均无差异：最佳，饥饿，加热和抗生素治疗。除了存活率以外，未感染“念珠菌”的mid和未感染in的翼长均无差异。总的来说，这些发现支持了我们的结论，即“ Candidatus Cardinium”对成年C. imicola ges的存活和大小没有明显影响。 “ Candidatus Cardinium”可能会影响未成熟阶段或可能改变成年生殖能力。

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