ROSEVILLE, Calif., July 3, 2018 – The Placer Mosquito and Vector Control District reported today that a mosquito sample has tested positive for West Nile virus this week.  The sample was collected from a site along the county’s western border.  … Continue reading

ROSEVILLE, Calif., August 11, 2017 – The Placer Mosquito and Vector Control District reported today that a mosquito sample has tested positive for St. Louis encephalitis virus (SLEV).  Laboratory staff detected the virus while performing routine testing of mosquito samples. … Continue reading

The Placer Mosquito and Vector Control District reported today that a mosquito sample has tested positive for West Nile virus this week.  The sample was collected from a site along the county’s western border.  Mosquito numbers have also increased in … Continue reading

Fourteen additional mosquito samples in Placer County have tested positive for West Nile virus (WNV) today, bringing the count to 26 WNV-positive mosquito samples in the county for the year. “This increase of activity is not unexpected.  With temperatures high … Continue reading

The Placer Mosquito and Vector Control District reported today that six mosquito samples and one dead bird have tested positive for West Nile virus this week.  The mosquito samples were collected from sites along the county’s western border, from as … Continue reading