Doctors without Borders, which goes by its French initials MSF, was forced to suspend treatment in Macenta in southeastern Guinea yesterday after crowds attacked one of its centres.
Conakry said the crowd had gathered as rumours circulated in the town that the virus was "imported into Guinea or that Ebola fever does not exist in our country".
Health authorities have reported 137 suspected or confirmed Ebola cases since the beginning of the year, of which 86 have been fatal.
A rare but extremely dangerous virus, Ebola is historically rooted in central Africa and has never before spread amongst humans in the west of the continent.
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MSF has described the outbreak as an "unprecedented epidemic" and warned the unusual geographical spread of cases complicates the task of containing it "enormously".
Guinea's government in a statement today vowed that lawbreakers would be brought to justice and said it was "calling for calm and serenity to enable our partners to support us to eradicate this epidemic".
Ebola leads to haemorrhagic fever, which causes muscle pain, weakness, vomiting, diarrhoea and, in severe cases, organ failure and unstoppable bleeding.
The tropical 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.
"The contribution of (MSF) and all international organisations that are supporting Guinea in the fight against the pandemic is invaluable and has helped so far to contain the disease," the government said.