Guinea's government raised the death toll in the Ebola epidemic raging through its southern forests and capital to 95 on Monday.
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 told AFP, without specifying the locations of the new deaths.
The most severe strains of Ebola have had a fatality rate of up to 90 percent 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, which goes by its French initials 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," says MSF health promoter Ella Watson-Stryker.
Pain, weakness, vomiting, diarrhoea
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.
"We have seen similar reactions in other countries in the past. In these situations, ensuring that local populations have a good understanding of the disease and its associated risks is key," said emergency coordinator Henry Gray.
MSF said it planned to restart its Macenta operation as soon as possible and treatment was continuing in Gueckedou, another town hit badly by the outbreak.
Mali has become the latest of Guinea's neighbours to announce suspected cases of Ebola, saying on Thursday that three victims had been placed in isolation while test samples were sent to the US Centers for Disease Control and Prevention.
With Liberia and Sierra Leone also reporting suspected cases, MSF has described the outbreak as an "unprecedented epidemic" and warned the unusual geographical spread of cases complicates the task of containing it "enormously".