LOS ANGELES » Health officials say an adolescent girl who traveled from Los Angeles County to El Salvador late last year was infected with the mosquito-transmitted Zika virus.

The department of public health said Tuesday that the girl, the county’s first known case of Zika, has since recovered. She traveled in November to Central America, where she probably contracted the illness.

No transmission of Zika virus infection has occurred in California or any other U.S. state.

Officials nationwide have warned travelers to take precautions from mosquitoes when visiting other countries. Zika has generally mild symptoms but is suspected in a surge of birth defects in Brazil, where infections were first identified last year.