Journal of the American Mosquito Control Association (2008) 24, 502-507

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Michael J. Turell, David J. Dohm, Christopher N. Mores, Lucas Terracina, Dennis L. Wallette Jr., Lawrence J. Hribar, James E. Pecor and Jamie A. Blow (2008)
Potential for North American mosquitoes to transmit Rift Valley fever virus
Journal of the American Mosquito Control Association 24 (4), 502-507
Abstract: The rapid spread of West Nile viral activity across North America since its discovery in 1999 illustrates the potential for an exotic arbovirus to be introduced and widely established across North America. Rift Valley fever virus (RVFV) has been responsible for large outbreaks in Africa that have resulted in hundreds of thousands of human infections and major economic disruption due to loss of livestock and to trade restrictions. However, little is known about the potential for North American mosquitoes to transmit this virus should it be introduced into North America. Therefore, we evaluated selected mosquito species from the southeastern United States for their ability to serve as potential vectors for RVFV. Mosquitoes were fed on adult hamsters inoculated 1 day previously with RVFV. These mosquitoes were tested for infection and ability to transmit RVFV after incubation at 26°C for 7-21 days. None of the species tested (Aedes taeniorhynchus, Ae. vexans, Culex erraticus, Cx. nigripalpus, Cx. quinquefasciatus, and Cx. salinarius) were efficient vectors after they fed on hamsters with viremias ranging from 104.1 to 106.9 plaque-forming units (PFU)/ml. However, Ae. taeniorhynchus, Ae. vexans, and Cx. erraticus all developed disseminated infections after they fed on hamsters with viremias between 108.5 and 1010.2 PFU/ml, and both Ae. vexans and Cx. erraticus transmitted RVFV by bite. These studies illustrate the need to identify the ability of individual mosquito species to transmit RVFV so that appropriate decisions can be made concerning the application of control measures during an outbreak.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Michael J. Turell, David J. Dohm, Lawrence J. Hribar, Jamie A. Blow

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Culex quinquefasciatus U.S.A. (SE)
Culex salinarius U.S.A. (SE)
Aedes vexans U.S.A. (SE)
Culex nigripalpus U.S.A. (SE)
Aedes taeniorhynchus U.S.A. (SE)
Culex erraticus U.S.A. (SE)