Wilton has become the 21st town in Connecticut where a mosquito has tested positive for West Nile virus.
The mosquito was trapped Sept. 9, along Saunders Drive. It was of the species Culex restuans, the same type of mosquito that tested positive in Wilton for West Nile last year. A total of seven mosquitoes were tested Sept. 9 at the trap. Test results were not available for the Spectacle Road trap.