West Nile Watch Update - Mosquito samples have tested positive in... Dallas County Health & Human Services sent this bulletin at 07/29/2022 01:30 PM CDT Having trouble viewing this email? View it as a Web page. West Nile Watch Update - July 29, 2022 Mosquito samples have tested positive for West Nile Virus in the following area(s): Dallas 75227 (1 pool) (1 new pool)