ALBANY — The polio virus was detected in wastewater samples from the suburban county near New York City where an unvaccinated adult recently contracted the life-threatening disease, but health officials said Tuesday they have not identified any additional cases.

The Centers for Disease Control and Prevention said the presence of the virus was detected in wastewater samples collected in early June from Rockland County, where officials on July 21 announced the first case of polio in the United States in nearly a decade.

The unidentified young adult had a strain of the virus that has since been genetically linked to samples found in Rockland County wastewater, as well to samples in London and the Jerusalem area.

The CDC said in a prepared statement said that the New York wastewater sample shows there may be more people in the community shedding the virus.