The World Health Organisation said on Wednesday that 5,160 people had died of Ebola in eight countries out of 14,098 cases of infection.
The WHO has acknowledged that the number of deaths is probably far higher, given that the fatality rate in the current outbreak is known to be about 70%.
The toll has risen from 4,960 deaths and 13,268 cases on Friday.
A Malian nurse has died of Ebola, the second confirmed death from the disease in the country.
Officials say the nurse had treated a man who arrived from Guinea at the Pasteur Clinic in Bamako, and the clinic was now in quarantine.
The latest case is unrelated to the first, when a two-year-old girl died from the disease in late October.
GUECKEDOU, Guinea, April 8 (Thomson Reuters Foundation) – Hiccups, say doctors in this remote corner of Guinea, are the final tell-tale sign of infection by the Ebola virus that has killed more than 100 people since an outbreak began this year.
Then come profuse bleeding, circulatory shock and death.
BAMAKO/CONAKRY (Reuters) – Mali said it had identified its first possible cases of Ebola since the start of an outbreak in neighbouring Guinea, adding to fears that the deadly virus was spreading across West Africa.
More than 90 people have already died in Guinea and Liberia in what medical charity Medecins Sans Frontieres (MSF) has warned could turn into an unprecedented epidemic in an impoverished region with poor health services. [ID:nL5N0MS4ZC]