The first case of human West Nile virus has been confirmed in Mesa County.  An adult female resident contracted the illness.  No word on the status of her condition.  Until now it’s been a relatively slow season for  infected mosquito trapped in the Grand Junction area.  Even so, Mesa County Health Dept. urges residents to be careful and use insect  repellent that contains DEET, and wear long sleeves and pants in areas where mosquitoes are active.  And remember to try to avoid outdoor activity  at dusk and dawn which are peak mosquito hours.