Suffolk County's mosquito spraying planned Tuesday for streets in Davis Park and Point O'Woods on Fire Island has been cancelled due to weather, according to a health department news release.

However, spraying of the pesticide sumithrin is planned for Wednesday from 6 to 10 p.m, weather permitting, on all streets in Ocean Bay Park on Fire Island, the release said.

The pesticide applications are designed to control mosquitoes, which can spread the West Nile virus through bites.

Suffolk County is reporting 199 mosquito samples and 37 birds testing positive for the virus this year. Two human cases have been confirmed in the county, with both people having recovered.

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Chances of experiencing medical problems because of the pesticide applications are low, health officials said, but residents may want to avoid exposure, with children and pregnant women especially advised to stay indoors during the treatment and for 30 minutes after the spraying.

For more information, call the county's spray hotline at 631-852-4939, or see online.