Abstract
Zika virus (ZIKV), a mosquito-borne flavivirus, poses a serious threat to public health worldwide, and Aedes albopictus is one of its vectors. To evaluate the potential of the entomopathogenic fungus Beauveria bassiana for ZIKV vector control, we compared the vectorial capacity of Ae. albopictus females blood-fed with ZIKV with or without exposure to Beauveria bassiana. We found that fungal infection significantly decreased the amount of ZIKV by 3.6-, 12.3- and 7.8-fold in mosquito midguts, heads and salivary glands, respectively. Similarly, fungal infection also reduced the rates of ZIKV dissemination, potential transmission and potential population transmission for mosquitoes by 26.8%, 38.4% and 35.2%, respectively. On the other hand, the median survival time and fecundity of fungus-infected mosquitoes were reduced by 84.2% and 39.8% in comparison with those of the non-fungus-infected mosquitoes. The first gonotrophic cycle length was increased by 15.3% because of fungal infection. This study revealed that B. bassiana infection significantly reduced the vectorial capacity of A. albopictus for ZIKV, which suggested that B. bassiana could be broadly and efficiently used in the field for the control of Zika vectors.
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Acknowledgements
We thank Dr. Changwen Ke for kindly providing Zika virus strain Z16006 to conduct this study. This research was supported by National Key R&D Program of China (2017YFD0500400), National Natural Science Foundation of China (81772217, 20180907, 81572012), Guangdong Provincial Natural Science Foundation Project (2016A030311025, 2017A030313694), Science and Technology Planning Project of Guangdong Province (2018A050506038) and Guangzhou health and medical collaborative innovation major special project (201604020011) to HJP.
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Our only experimental animal is Aedes albopictus, which does not involve animal ethical issues.
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Communicated by E. Quesada-Moraga.
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Deng, S., Huang, Q., Wei, H. et al. Beauveria bassiana infection reduces the vectorial capacity of Aedes albopictus for the Zika virus. J Pest Sci 92, 781–789 (2019). https://doi.org/10.1007/s10340-019-01081-0
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DOI: https://doi.org/10.1007/s10340-019-01081-0