Several Brazos Valley counties have mosquitoes test positive for West Nile virus KBTXWilliamson County resident tests positive for West Nile virus KXAN.comWilliamson Co. confirms first human case of West Nile, Hays Co. reports positive traps KEYE TV CBS AustinThree mosquito traps around Denton test positive for West Nile virus KERA NewsWest Nile Virus-infected pools found in Corpus Christi KIIITV.com