Another Species May Carry Zika

Mosquito Control - Mosquito Control

UF/IFAS Florida Medical Entomology Lab researchers have found Culex quinquefasciatus can contain live Zika virus in saliva.

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March 11, 2019

Culex quinquefasciatus
UF/IFAS Communications, University of Florida

Another mosquito may carry the Zika virus, but more research is needed to confirm the early lab tests, University of Florida scientists reported. UF Institute of Food and Agricultural Sciences researchers detected Zika in the saliva of southern house mosquitoes collected in Florida.

Chelsea Smartt, an associate professor at the UF/IFAS Florida Medical Entomology Lab in Vero Beach, Fla., said her study’s finding supports that the mosquito species, known scientifically as Culex quinquefasciatus, can contain live Zika virus in saliva. To date the mosquito species Aedes aegypti is considered the primary carrier of Zika virus.

Smartt said researchers must perform more experiments to know whether and how much of a role Culex quinquefasciatus plays in spreading Zika.

In 2016, Zika caused cases of microcephaly — a rare neurological condition in which an infant’s head is significantly smaller than the heads of other children of the same age and gender — in some newborns in the United States, due in part to traveler-related global spread of Zika virus.

Scientists worldwide, including Smartt, have been studying the origins of Zika and how to control it.

Culex quinquefasciatus is common in the southern U.S. and is abundant in Florida, she said. The mosquito is found in tropical and sub-tropical areas, including Brazil, Africa and Southeast Asia.

In areas of the world where these mosquitoes feed on humans, there may be populations of Culex quinquefasciatus that can spread Zika, Smartt said.

Her research was published in the journal Frontiers of Microbiology (April 26, 2018). Source: Brad Buck, UF/IFAS