文章基本信息

标题：Contribution of the horizontal transmission of the entomopathogenic fungus Beauveria bassiana to the overall performance of a fungal powder formulation against Triatoma infestans
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作者：Lucas Forlani ; Nicolás Pedrini ; M Patricia Juárez 等
期刊名称：Research and Reports in Tropical Medicine
印刷版ISSN：1179-7282
电子版ISSN：1179-7282
出版年度：2011
卷号：2
页码：135-140
DOI：10.2147/RRTM.S22961
出版社：Dove Medical Press Ltd
摘要：Control of domiciliated Triatoma infestans , the major Chagas disease vector in southern South America, is currently achieved by indoor residual spraying of infested houses with chemical insecticides. However, in recent years this strategy has been threatened by the emergence of pyrethroid-resistant bug populations. As an alternative approach, we have previously demonstrated the efficacy of the entomopathogenic fungus Beauveria bassiana to control T. infestans bugs regardless of their pyrethroid susceptibility. In this work, we tested the virulence and residual activity of a powdered fungal formulation, and studied the significance of the horizontal transmission process (autodissemination) to fungal infection of bugs. The B. bassiana -based formulation was highly virulent against all T. infestans stages, and maintained its insecticidal capability for at least 5 months under natural ambient conditions. We showed that horizontal transmission of conidia is associated to bug density, and contributes significantly to the overall population infection event.
关键词：Chagas disease vectors; triatomines; biocontrol; autodissemination