Bay Area’s first Zika case diagnosed in Napa County

A pregnant Napa County woman who had traveled to Central America has tested positive for the Zika virus in the Bay Area’s first case of the mosquito-borne disease, health officials said.

There is no active transmission of Zika virus in Napa County, and the two kinds of mosquitoes that transmit the virus have not been found here, Dr. Karen Relucio, Napa County Health Officer, said in a statement.

California public health officials know of six state residents who have tested positive for the virus, including one from Yolo County.

Napa County health officials said pregnant women and those with sexual partners who travel to countries where Zika is prevalent should exercise caution.

“Anyone who is planning to travel to a country with active Zika virus transmission should consult with their health care provider before leaving, especially if they are pregnant or are considering becoming pregnant,” Relucio said.