With an eye to adult mosquito control, Suffolk County is launching its ground spraying efforts Tuesday evening, weather permitting, health officials said.

Spraying with the pesticide Anvil is planned for 6 p.m. to 10 p.m. on all streets in Davis Park and Point O'Woods on Fire Island, the health department said. The pesticide Scourge will be used from 7:30 p.m. to 11:30 p.m. to treat parts of Bellport and Brookhaven Hamlet.

Some mosquitoes through bites transmit West Nile virus to humans. Mosquitoes pick up the virus from feeding on infected birds.

Last year ranked as the second-worst in U.S. West Nile virus cases since the disease was first detected in this area in 1999, the Centers for Disease Control and Prevention said.

Nassau and Suffolk counties reported 14 human cases each last year, including one Nassau death.

The chances of experiencing health effects from ground spraying are "quite low," the health department said in a release, but children and pregnant women should avoid exposure when possible by steering clear of the area during and at least 30 minutes after spraying.

Among the "common sense steps" the department suggests:

Close doors, windows and air conditioning vents during and 30 minutes after spraying;

Bring indoors laundry, children's toys, pet food and water dishes;

Cover ornamental fish ponds.

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Learn more at the county's spraying information hotline 631-852-4939, as well as www.suffolkcountyny.gov/Departments/HealthServices.aspx