In the three weeks since San Joaquin County first reported mosquitoes testing positive for West Nile virus, one area has emerged as a hotbed for the infected pests.
More than 80% of the mosquito samples that have tested positive for West Nile virus this summer in San Joaquin County have been found in the Tracy area, officials said.
According to the county’s Mosquito and Vector Control District’s laboratory surveillance and disease testing system, officials have found infected mosquitoes for the last four consecutive weeks in and around Tracy…