With a mosquito sample collected July 21 at Blydenburgh County Park in Smithtown testing positive for West Nile virus, officials have advised suspending park activities from 6 p.m. to 8 a.m., the Suffolk County health department said Friday.

The parks commissioner has been notified, officials said in a release.

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Six other mosquito samples, all Culex pipiens/restuans, also tested positive. The samples were collected July 21 and 22 in West Islip, East Northport, Lindenhurst, West Babylon and Copiague. That brings to 19 the total number of mosquito samples for the year in Suffolk, along with three birds.

Nassau County reported three positive mosquito samples this year, a spokeswoman said.