Guinea's government has raised the death toll in the Ebola epidemic raging through its southern forests and capital to 95.
The health ministry added nine deaths to the toll of 86 given before the weekend, saying that 52 cases had been confirmed in laboratories to be the killer tropical virus.
"Up to now, the Guinean authorities have registered 151 suspect cases and 95 deaths," the ministry's chief disease prevention officer Sakoba Keita said, without specifying the locations of the new deaths.
The most severe strains of Ebola have had a fatality rate of up to 90 per cent and there is no vaccine, cure or specific treatment.
But patients' chances of survival increase if they are kept hydrated and receive treatment for secondary infections, according to experts.
A number of patients have been discharged from Ebola treatment centres in Guinea after beating the virus, medical charity Doctors Without Borders (MSF) said in a statement.
"When the first patient came out from the treatment centre, I was so happy and the whole team was cheering," Marie-Claire Lamah, a Guinean doctor working in Conakry, was quoted as saying by MSF.
Various studies - including a paper published in the New England Journal of Medicine last year - have demonstrated some immunity in survivors from the particular strain to which they were exposed, but life-long immunity has not been demonstrated.
MSF said it was working with local communities to ensure that discharged patients who have beaten the virus can return home safely, and that everyone understands they are no longer contagious.
"We explain to the families and neighbours that the patient is now negative and doesn't present any risks to anyone - they can be kissed, touched and hugged without any risk of contagion," said MSF health promoter Ella Watson-Stryker.
Ebola leads to haemorrhagic fever, which causes muscle pain, weakness, vomiting, diarrhoea and, in severe cases, organ failure and unstoppable bleeding.
The virus can be transmitted to humans from wild animals, and between humans through direct contact with another's blood, faeces or sweat.
Sexual contact, or the unprotected handling of contaminated corpses, can also lead to infection.
MSF has halted its activities in Macenta, in the southeastern epicentre of the outbreak, after a mob threw stones at buildings and vehicles, under the mistaken impression that the disease had been brought into the country by the charity.
