SMITHTOWN - (AP) - Health officials on Long Island have decided to close a county park during nighttime hours after amosquito there tested positive for the West Nile virus.

Suffolk County's health commissioner tells Newsday that Blydenburgh County Park in Smithtown will close at 6 p.m. daily, when mosquitoes start to become more active. It will reopen at 8 a.m.

The West Nile virus is mild for most people, but can be deadlyfor others with weak immune systems.

Mosquitoes transmit the disease. Suffolk Health CommissionerJames Tomarken says the presence of the virus in the park'smosquito population is no cause for alarm, but said residentsshould still consider covering up when they are outside in theevenings.