A Scientist Journal Says 243 Mosquito Species Recorded in Cambodia

AKP Phnom Penh, June 05, 2019 — 

Two hundred and forty-three (243) mosquito species belonging to 20 genera have been recorded in Cambodia, according to a report of Cambodian Journal of Natural History.  

The Aedes aegypti is the main vector for dengue virus transmission to humans, whereas A. albopictus is considered the second most important vector. 

This research has been conducted with an aim to determine the diversity and relative abundance of dengue vectors in 19 primary schools in Kampong Cham province and five primary schools in Thbong Khmum province. 

According to the report, BG-sentinel traps and CDC light traps were used to collect mosquitoes at these in May and August 2017. 

This resulted in the capture of 10,793 mosquitoes, 3,969 of which were caught in May and 6,824 in August. Fifty-four (54) species of mosquito arranged in 11 genera were identified from the material collected, although a few other species were identified only to genus. 

Three species represented 63.5 percent of all mosquitoes collected: Culex vishnui (group), C. quinquefasciatus and Anopheles indefinitus. Fewer mosquito species were caught in May (n=40) than August (n=46) and more were caught in CDC light traps (n=54) compared to BG-sentinel traps (n=20). 

There was also no significant difference in numbers of A. aegypti mosquitoes present in schools selected for insecticide treatment by the ECOMORE 2 project and schools which would not be treated. With 183 female A. aegypti (1.7 percent of captures) and 116 female A. albopictus (1 percent) recorded, the major vectors for dengue virus were not the most abundant species.  

However, vectors for Japanese encephalitis virus such as C. vishnui (group) and C. quinquefasciatus were abundant and could infect humans living nearby the schools at night.  

With his finding the researcher suggested that mosquito diversity and their relative species abundances variably depend on habitat, season and places for rest. It concluded that vector control is needed to protect children and other local residents from associated disease infections. 

By Khan Sophirom