West Nile Watch Update - Mosquito samples have tested positive in... Dallas County Health & Human Services sent this bulletin at 07/24/2020 01:03 PM CDT Having trouble viewing this email? View it as a Web page. West Nile Watch Update - July 24, 2020 Mosquito samples have tested positive for West Nile virus in the following areas: Dallas 75212 (1 pool) 75216 (1 pool) 75224 (2 pools) 75235 (1 pool) 75243 (1 pool) Mesquite 75149 (5 pools) 75181 (2 pools) (13 New Pools)