Parasites can be transmitted either or both, vertically or horizontally, but the costs or benefits for the host due to infection have only been tested after horizontal transmission. Here as far as we know, is reported for the first time the survival, reproduction and infection of Aedes aegypti during vertical and horizontal transmission of Dengue virus 2 (DENV-2). Females infected horizontally produced more eggs with a sex ratio skewed to males compared to uninfected controls. However, there was a not significant difference on the number of emerging adults or mothers survival. On the other hand, dengue infected female offspring (vertical transmission) had shorter lifespan but compared to controls, there were no significant differences the amounts of eggs or sex ratio. Finally, the corroboration of infection revealed that virus infected about 11.5 % and 8.8 % of pools of mothers and of daughters, respectively. These results suggest that the mode of infection and the contact with the virus has no reproductive costs on female mosquitoes, which may explain why both types of transmission are evolutionary maintained. In addition, we suggest that more attention should be paid on male contribution to virus dissemination within and among populations and as reservoirs of the infection for human diseases.
- Received July 7, 2016.
- Accepted August 29, 2016.
- © 2016. Published by The Company of Biologists Ltd