At least 17 people have died in an area of northwestern Democratic Republic of Congo where health officials have now confirmed an outbreak of Ebola.
It is the ninth time Ebola has been recorded in the central African nation, whose eastern Ebola river gave the deadly virus its name when it was discovered there in the 1970s, and comes less than a year after its last outbreak which killed eight people.
"Our country is facing another epidemic of the Ebola virus, which constitutes an international public health emergency," the country's health ministry said in a statement.
"We still dispose of the well trained human resources that were able to rapidly control previous epidemics."
Ebola is believed to be spread over long distances by bats, which can host the virus without dying, as it infects other animals it shares trees with such as monkeys. It often spreads to humans via infected bushmeat.
Before the outbreak was confirmed, local health officials reported 21 patients showing signs of haemorrhagic fever around the village of Ikoko Impenge. Seventeen of those later died.
Medical teams supported by the World Health Organisation and medical charity Medecins Sans Frontieres were dispatched to the zone on Saturday and took five samples from suspected active cases.
Two of those samples tested positive for the Zaire strain of the Ebola virus, the ministry said.
"Since notification of the cases on May 3, no deaths have been reported either among the hospitalised cases or the healthcare personnel," the statement said.
After Congo's last Ebola flare-up, authorities there approved the use of a new experimental vaccine but in the end did not deploy it owing to logistical challenges and the relatively minor nature of the outbreak.
A Liberian health worker in a burial squad drags an Ebola victim's body for cremation. Source: AAP
The worst Ebola epidemic in history ended in West Africa just two years ago after killing more than 11,300 people and infected some 28,600 as it rolled through Guinea, Sierra Leone and Liberia.
Despite regular outbreaks every few years, death tolls in Congo have been significantly lower.
