Raymond Pescatore, a Nassau County Health Department worker, demonstrates how...

Raymond Pescatore, a Nassau County Health Department worker, demonstrates how this trap will help catch mosquitoes for a county survey of the insects, especially any possible carriers of West Nile virus. (June 3, 2011) Credit: Steven Sunshine

Five more mosquito pools in Suffolk County have tested positive for the West Nile virus, the county health department said this week.

County officials also said pesticides to combat mosquitoes would be sprayed in some parts of the county Thursday night.

The positive samples were taken from pools in Lindenhurst, Copiague, Mastic Beach, Port Jefferson Station and Huntington on July 27 and 28, the Suffolk County Department of Health Services said in a news release.

The first reported positive results for Suffolk County this year had been from a mosquito a pool in Patchogue taken on June 30. The only positive sample in Nassau County to date was taken in West Hempstead on July 8.

Here are the areas that will be sprayed Thursday evening, weather permitting.

6:30 p.m. to 10:30 p.m.: All streets in the villages of Fire Island Pines, Water Island, Summer Club and Atlantique on Fire Island will have ground spraying of Anvil (sumithrin), an ultra-low-volume aerosol.

7:30 p.m. to 11:30 p.m.: South Shirley, Mastic Beach and Old Mastic, including all streets south of Alcolade Drive West, Chanel Drive, Mastic Road and Riverside Avenue from the Forge River to Bellport Bay, including Smith Point Park, campgrounds and marina. There will be ground spraying of Scourge (resmethrin), an ultra-low-volume aerosol.

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