Two new mosquito samples testing positive for West Nile virus brings the total for the year so far to 200 in Suffolk County, health officials reported Tuesday.
The new samples, Aedes japonicus and Aedes vexans, were collected Sept. 30 in Bay Shore and Oct.6 in Greenlawn.
The county has also reported four human cases of the virus, but no deaths.
Nassau County has had 61 positive mosquito samples, nine human cases and no deaths, a health department spokeswoman said.
Some mosquito bites can transmit West Nile to humans, with mosquitoes picking up the virus by feeding on infected birds.
In some cases, the virus causes serious neurological illnesses that can lead to health conditions or death.
Last year, Nassau reported four human cases of West Nile and no deaths, and Suffolk reporting one case and no deaths.