A Riverside County resident who was a passenger on the Diamond Princess, a cruise ship in Japan, has tested positive for the coronavirus and is being treated in Northern California, health officials announced Tuesday.

The resident is in good condition and is expected to recover, according to the Riverside University Health System. The person's name is being withheld for privacy reasons.

The resident is being closely monitored and that there are no exposures so far in Riverside County, said Dr. Cameron Kaiser, Riverside County's public health officer, in a news release.

The Diamond Princess had been on a 14-day cruise with more than 2,600 passengers. Some of them have tested positive for the virus, health officials said.

More than 300 of the Diamond Princess passengers are in the midst of a two-week quarantine at U.S. military bases in California, Texas and Colorado. A hospital in Nebraska also is being utilized.

Forty Americans who spent time on the ship, including the Riverside County resident, have tested positive for the virus.

Another 100 Americans who were on the Diamond Princess remain in Japan, where the ship is docked. U.S. officials have barred those passengers from returning home for a period of two weeks.

So far, there have been no reported cases in Riverside County.

In the United States, as of Tuesday, there were 57 confirmed cases. No one in the U.S. has died, although one American did die while still in Wuhan, China, authorities said.

Last month, 195 U.S. evacuees flew to Riverside County from Wuhan and were quarantined for two weeks at March Air Reserve Base near Moreno Valley.

None of them tested positive and all were allowed to return home in other parts of the country.

More:Coronavirus quarantine cost Riverside County $1.3M; Raul Ruiz wants the money back

More:Coronavirus quarantine ends for 195 people who flew into Riverside County two weeks ago

USA Today and Desert Sun reporter Colin Atagi contributed to this report.

Shane Newell covers breaking news and the western Coachella Valley cities of Palm Springs, Cathedral City and Desert Hot Springs. He can be reached at shane.newell@desertsun.com, (760) 778-4649 or on Twitter at @journoshane.