Less than 1% of West Nile patients develop neuroinvasive illness, which involves the brain, spinal cord, and meninges.
The mosquitoes, captured above Mali and Ghana, were found to be infected with arboviruses, protozoans, and parasitic worms that cause human diseases.
So far this year Los Angeles County has documented 14 West Nile virus cases.
Mexico has seen 55 human cases of New World screwworm this year.
The death, in a county where high numbers of West Nile virus-positive mosquitoes and dead birds have been found, is the fifth West Nile virus-related death in the state this year.
81% correctly said the best defense against the virus was avoiding getting bitten by a mosquito.
Rising temperatures, longer summers, milder winters, and changing rainfall patterns are creating more favorable conditions for mosquito populations.
The authors found a positive correlation between intraseason genetic diversity and increased temperature.
California has reported 63 West Nile virus infections this year, including many in the Central Valley.
The announcement follows detection of the state's first EEE case since 2020.
