A flare-up of Ebola has been proclaimed in Uganda after health authorities affirmed a case of the generally uncommon Sudan strain, the health ministry and World Health Organization (WHO).

A 24-year-elderly person in Uganda's focal Mubende district showed symptoms and later passed on.

"We need to illuminate the country that we have a flare-up of Ebola which we affirmed yesterday," Diana Atwine, the health ministry's extremely durable secretary, told a news meeting.

She said the patient with the affirmed case had high fever, looseness of the bowels and stomach pains and was regurgitating blood. He had at first been treated for intestinal sickness.

There are presently eight suspected cases getting care in a health office, WHO's Africa office said in a statement, adding that it was assisting Uganda's health authorities with their investigation and conveying staff to the impacted region.

"Uganda is no stranger to compelling Ebola control. Thanks to its expertise, a move has been made rapidly to recognize the virus and we can put money on this information to stop the spread of infections," Matshidiso Moeti, WHO Africa's regional director, said.

The WHO said there had been seven previous outbreaks of the Ebola Sudan strain, four in Uganda and three in Sudan.

It said Uganda last detailed a flare-up of Ebola Sudan strain in 2012 and an episode of the Ebola Zaire strain in 2019.

The WHO said ring vaccination of high-risk individuals with the Ervebo vaccine had been exceptionally powerful in controlling the spread of Ebola in late outbreaks in the Democratic Republic of the Congo and elsewhere yet that this vaccine had just been supported to safeguard against the Zaire strain.

Another vaccine created by Johnson and Johnson might be viable however has yet to be specifically tested against the Sudan strain, it added.