Sierra Leone has doubled its death toll from the Ebola virus, saying it had 109 suspected cases and a further six people dead.
The World Health Organisation declared the situation "serious" when new cases surfaced after officials thought they had contained the virus.
Senegal had closed the border more than a month earlier in an attempt to contain the outbreak of the deadly virus in neighbouring Guinea.
Eight people have now recovered from the Ebola virus, which has a fatality rate of up to 90%.
Mining firms have locked down operations in Guinea and pulled out some international staff as the death toll from suspected Ebola cases hit 83.
Guinea’s capital Conakry is on high alert after a deadly Ebola epidemic that has killed dozens in the southern forests, spread to the port city.
Guinea has battled to contain an Ebola epidemic threatening neighbouring countries as fear and confusion grips its people.
Liberia suspects numerous infections and five deaths are from the Ebola virus spreading from neighbouring Guinea, with one suspected case in Canada.
French scientists have identified the Ebola virus as the source of an outbreak of haemorrhagic fever in southern Guinea.
Six suspected cases of Ebola have been reported in north-eastern DRC, just six months after an outbreak of the deadly virus ended in the area.
Scores of Ugandans have been isolated to prevent the spread of a new outbreak of Ebola, which has already killed three people.
An outbreak of Ebola fever in the Democratic Republic of Congo may have claimed up to 32 lives since May, says the World Health Organisation.
Apart from a medical officer, the victims are all from a single family, according to reports.
Ebola has broken out in Uganda, killing at least 14 people as health officials battle to stem the spread of the deadly virus.
Initial test results indicate that a 12-year-old girl died of the deadly Ebola virus in a town about 35km north of Kampala.
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/ 12 January 2009
An Ebola outbreak in the DRC has not spread into neighbouring Angola, an official with the World Health Organisation (WHO) said Monday.
Angola closed part of its north-eastern border with the DRC on Monday to stop the Ebola virus from spreading into nation, the health minister said.