4.6 Article

Internal and external microbiota of home-caught Anopheles coluzzii (Diptera: Culicidae) from Cote d'Ivoire, Africa: Mosquitoes are filthy

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PLOS ONE
卷 17, 期 12, 页码 -

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PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0278912

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  1. Department of the Army, U.S. Army Contracting Command, Aberdeen Proving Ground, Natick Contracting Division, Ft Detrick MD [W911QY1910003]
  2. NCSU NSF Center for Integrated Pest Management
  3. Institute of Plant Protection in the Chinese Academy of Agricultural Sciences (CAAS)
  4. Chinese Scholarship Council
  5. Department of Entomology and Plant Pathology at NC State University

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This study analyzed the bacterial community of female Anopheles coluzzii mosquitoes collected from homes in Cote d'Ivoire, Africa. The results showed that mosquitoes have a diverse bacterial community internally, with bacteria on the external body associated with plants, human and animal skin, and infections. The presence of potentially disease-causing bacteria internally suggests the need for further research on the mechanical transmission of bacteria by mosquitoes and the importance of the mosquito microbiota in human health.
Over the past 10 years, studies using high-throughput 16S rRNA gene sequencing have shown that mosquitoes harbor diverse bacterial communities in their digestive system. However, no previous research has examined the total bacteria community inside versus outside of mosquitoes and whether bacteria found on the outside could represent a potential health threat through mechanical transfer. We examined the bacterial community of the external surface and internal body of female Anopheles coluzzii adults collected from homes in Cote d'Ivoire, Africa, by Illumina sequencing of the V3 to V4 region of 16S rRNA gene. Anopheles coluzzii is in the Anopheles gambiae sensu lato (s.l.) species complex and important in the transmission of malaria. The total 16S rRNA reads were assigned to 34 phyla, 73 orders, 325 families, and 700 genera. At the genus level, the most abundant genera inside and outside combined were Bacillus, Staphylococcus, Enterobacter, Corynebacterium, Kocuria, Providencia, and Sphingomonas. Mosquitoes had a greater diversity of bacterial taxa internally compared to the outside. The internal bacterial communities were similar between homes, while the external body samples were significantly different between homes. The bacteria on the external body were associated with plants, human and animal skin, and human and animal infections. Internally, Rickettsia bellii and Rickettsia typhi were found, potentially of importance, since this genus is associated with human diseases. Based on these findings, further research is warranted to assess the potential mechanical transmission of bacteria by mosquitoes moving into homes and the importance of the internal mosquito microbiota in human health.

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