The Tamil Nadu Health Department has stepped up surveillance in villages bordering Kerala in Coimbatore district following confirmed cases of West Nile fever cases in the neighbouring State.
Health officials said that the preventive measures started from Thursday.
The Kerala government issued an alert against the mosquito-borne viral disease on May 7, after the State reported one death and around eight cases of the infection in Kozhikode, Malappuram and Thrissur districts in the past few days.