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Toward the definition of Aedes albopictus and Aedes koreicus pathobioma from an area of recent invasion in northern Italy

By F. Rosso, V. Tagliapietra, D. Albanese, M. Pindo, F. Baldacchino, D. Arnoldi, C. Donati and A. Rizzoli


Aedes mosquitoes are considered highly successful invasive species globally. They are also vectors of\ud several viruses of medical importance. As other species, they host a community of bacteria in their\ud midgut, which can play an important role in affecting their fitness, physiology, food digestion,\ud metabolism, immunity, adaptation to new environmental conditions including the capacity to transmit\ud pathogens. Using a metagenomic approach we characterized the microbial community of two mosquito\ud species of medical relevance: Aedes albopictus and Aedes koreicus. Using high‐throughput sequencing\ud we analysed the v3‐v4 hypervariable region of 16s rRNA of the midgut from 30 non‐fed Ae. albopictus\ud females and 30 non‐fed Ae. koreicus females from the Province of Trento. Alpha and beta diversity\ud indices were used to assess the diversity and richness of bacterial communities in both mosquito species\ud and the differences among countries. The two species showed a large core microbiota, including 75.98%\ud of the identified Operational Taxonomic Units, largely composed by species of the genus Pseudomonas,\ud suggesting a common developmental environment. Notably Wolbachia, an intracellular endosymbiont\ud of mosquitoes known to modulate their ability to transmit many pathogens, was present in Ae.\ud albopictus (0.1%) but not in Ae. koreicus, while Asaia spp. was found mainly in Ae. koreicus (14.42%) and\ud in very low proportions in Ae. albopictus (0.07%). In conclusion, assessing the composition and diversity\ud of invasive mosquito species gut microbiota provides the basis for the development of further research\ud studies aimed at characterizing the effect of environmental conditions on vectorial capacity and\ud therefore the actual disease hazard within a new habitat

Topics: Aedes albopictus, Aedes koreicus, Pathobioma, Northern Italy, Settore VET/06 - Parassitologia E Malattie Parassitarie Degli Animali
Year: 2018
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