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Oviposition Responses of Anopheles gambiae s.s. (Diptera Culicidae) and Identification of Volatiles from Bacteria-Containing Solutions:  
Stockholm University, Faculty of Science, Department of Genetics, Microbiology and Toxicology.
Stockholm University, Faculty of Science, Department of Genetics, Microbiology and Toxicology.
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2008 (English)In: Journal of medical entomology, ISSN 0022-2585, E-ISSN 1938-2928, Vol. 45, no 6, 1039-1049 p.Article in journal (Refereed) Published
Abstract [en]

In this study, a dual-choice oviposition bioassay was used to screen responses of gravid An. gambiae toward 17 bacterial species, previously isolated from Anopheles gambiae s.l. (Diptera: Culicidae) midguts or oviposition sites. The 10 isolates from oviposition sites have been identified by phylogenetic analyses of their 16S rRNA genes. Eight of the 10 isolates were gram-positive, out of which six belonged to the Bacilli class. Solid phase microextraction and gas chromatography coupled to mass spectrometry (GC-MS) were used to identify the volatiles emitted From the bacterial isolates, Aromatic and aliphatic alcohols, aliphatic ketones, alkylpyrazines, dimethyl oligosulfides, and indole were among the chemical compounds identified from the headspace above bacteria-containing saline. The mosquitoes laid significantly more eggs in six of the bacteria-containing solutions compared with the sterile solution. These six bacteria did not emit any compounds in common that could explain the positive oviposition response. Instead. the bacteria were grouped according to principal component analysis (PCA) based on the relative amouts of volatile emitted. The PCA-plots facilitated the identification of 13 putative oviposition attractants for An. gambiae mosquitoes.

Place, publisher, year, edition, pages
2008. Vol. 45, no 6, 1039-1049 p.
Keyword [en]
Anopheles, bacteria, oviposition response, solid phase microextraction, gas chromatography coupled to mass spectrometry
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:su:diva-57877ISI: 000260661000010OAI: oai:DiVA.org:su-57877DiVA: diva2:418493
Note
authorCount :5Available from: 2011-05-23 Created: 2011-05-23 Last updated: 2017-12-11Bibliographically approved

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CiteExportLink to record
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