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Background   Aedes aegypti  and  A. atropalpus  are related mosquitoes that differ reproductively.  Aedes aegypti  must blood-feed to produce eggs (anautogenous) while  A. atropalpus  always produces a first clutch of eggs without blood-feeding (facultatively autogenous). We recently characterized the gut microbiota of  A. aegypti  and  A. atropalpus  that were reared identically in the laboratory. Here, we assessed the effects of specific members of the gut microbiota in  A. aegypti  and  A. atropalpus  on female fitness including egg production.    Methods  Gnotobiotic  A. aegypti  and  A. atropalpus  larvae were colonized by specific members of the gut microbiota. Survival, development time, size and egg production for each treatment was then compared to axenic and conventionally reared larvae.    Results  Most species of bacteria we tested supported normal development and egg production by  A. aegypti  but only one betaproteobacterium, a  Comamonas , supported development and egg production by  A. atropalpus  to equivalent levels as conventionally reared females.  Aedes atropalpus  females colonized by  Comamonas  contained similar stores of glycogen and protein as conventionally reared females, whereas females colonized by  Aquitalea  did not. Small differences in bacterial loads were detected between gnotobiotic and conventionally reared  A. aegypti  and  A. atropalpus , but this variation did not correlate with the beneficial effects of  Comamonas  in  A. atropalpus .    Conclusions  Specific members of the gut microbiota more strongly affected survival, size and egg production by  A. atropalpus  than  A. aegypti .    Electronic supplementary material  The online version of this article (doi:10.1186/s13071-016-1660-9) contains supplementary material, which is available to authorized users.

parasites and vectors

Gut bacteria differentially affect egg production in the anautogenous mosquito Aedes aegypti and facultatively autogenous mosquito Aedes atropalpus (Diptera: Culicidae)