West Nile Watch Update - Mosquito samples have tested positive in... Dallas County Health & Human Services sent this bulletin at 09/29/2020 03:33 PM CDT Having trouble viewing this email? View it as a Web page. West Nile Watch Update - September 29, 2020 Mosquito samples have tested positive for West Nile virus in the following areas: Richardson 75081 (1 pool) Sachse 75048 (1 pool) (2 new pools) For more information on West Nile virus visit: https://www.dallascounty.org/departments/dchhs/westnile.php