India, July 13 -- A U.S. citizen working for a humanitarian organization in the Democratic Republic of Congo has tested positive for the Ebola virus, the U.S. Centers for Disease Control and Prevention (CDC) said on Friday.

The CDC said it is working with the aid organization, U.S. government agencies, Congolese health officials and other partners to stop the virus from spreading and trace people who may have been in close contact with the infected person.

The patient was admitted to Frankfurt University Hospital in Germany early on Monday. According to hospital officials, the person was taken to a special isolation unit at around 3 a.m. local time after being infected with the Bundibugyo strain of the Ebola virus in Congo.

The aid worke...