A plumber working for the United Nations' peacekeeping mission in eastern Congo has tested positive for Ebola, the health ministry said on Friday, the first case of a U.N. worker contracting the disease during the current outbreak.

The plumber is believed to have contracted the virus at a health centre in the city of Beni run by a traditional healer where someone with Ebola had sought treatment, the ministry said in a daily bulletin.

The Ebola outbreak in Congo's eastern borderlands with Uganda and Rwanda has worsened markedly in recent weeks due to community resistance to health workers and insecurity caused by rebel groups active in the area.