Bacterial diversity of cosmopolitan Culex pipiens and invasive Aedes japonicus from Germany

Sina Zotzmann 1, 2 Antje Steinbrink 1, 2 Kathrin Schleich 1, 2 Felix Frantzmann 1, 2 Chinhda Xoumpholphakdy 1, 2 Manuela Spaeth 1, 2 Claire Valiente Moro 3 Patrick Mavingui 3, 4 Sven Klimpel 2, 1
1 Institute of Ecology, Evolution and Diversity
2 Senckenberg Biodiversity & Climate Research Centre
3 LEM - Laboratoire d'Ecologie Microbienne - UMR 5557
4 PIMIT - Processus Infectieux en Milieu Insulaire Tropical
Abstract : Symbiotic bacteria have gained significant attention in recent years. For example, microbiota of some mosquito species seems to influence the development and transmission of pathogens. Furthermore, several attempts using bacteria as a paratransgenetic tool have been made in order to assist the control of mosquito-borne diseases. In this study, we examined the bacterial diversity of wild-caught adult Culex (Cx.) pipiens and laboratory-reared adult Aedes japonicus (Ae. japonicus) in Germany using a culture-independent method. Genomic DNA was extracted from each specimen and submitted to PCR amplification of eubacterial 16S rDNA. After the cloning reaction , 28 bacterial transformants per sample containing the 16S rDNA inserts were selected per each sample for se-quencing. The analysed specimens of Cx. pipiens as well as of Ae. japonicus showed a diverse bacterial community including some common bacterial genera. Blast analysis allowed to identify 21 bacterial genera belonging to 2 phyla among the 23 specimens of Cx. pipiens. The 14 analysed Ae. japonicus revealed 11 bacterial genera belonging to 3 phyla. In both mosquito species, identified isolates were mainly Proteobacteria. Only 4 of the bacterial genera were found in both mosquito species, with the most prevalent genera Sphingomonas and Rahnella in Cx. pipiens and in Ae. japonicus respectively. Most of the bacterial genera found in our study have been identified in other mosquito species before. Due to the currently scarce data situation, ongoing examinations on the very abundant bacterial genera or species are strongly required to determine their relevance for the biology and adaptiveness of mosquitoes including pathogen-host relationship.
Keywords : Culex pipiens Bacterial diversity Aedes japonicus
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Sina Zotzmann, Antje Steinbrink, Kathrin Schleich, Felix Frantzmann, Chinhda Xoumpholphakdy, et al.. Bacterial diversity of cosmopolitan Culex pipiens and invasive Aedes japonicus from Germany. Parasitology Research, Springer Verlag (Germany), 2017, 116 (7), pp.1899-1906. ⟨10.1007%2Fs00436-017-5466-2⟩. ⟨hal-01591781⟩

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