Human West Nile case tied to Grant County mosquitoes

A Pierce County woman in her 30s who recently spent time in Grant County has been confirmed as having West Nile virus. Tacoma-Pierce County Health Department has investigated the case and determined that the individual was likely exposed to the infected mosquitoes during her stay in Grant County.

So far this year, there have been four other human cases in Washington; two of those cases were exposed in-state in Walla Walla and Benton counties, the two other cases were exposed while traveling out of the state. The virus causing West Nile disease has been detected in 26 mosquito samples from Gran...