London, Oct 25 (IANS): The World Health Organisation (WHO), in its latest report Saturday said the number of Ebola virus cases has exceeded 10,000, with 4,922 deaths.

Only 27 of the cases have occurred outside the three worst-hit countries -- Sierra Leone, Liberia and Guinea -- BBC reported.

These three countries account for all but 10 of the fatalities.

Mali became the latest nation to record a death, a two-year-old girl.

More than 40 people known to have come into contact with her have been quarantined.

The latest WHO report also said that Liberia remains the worst affected country, with 4,665 cases.

Sierra Leone has had 3,896 cases and Guinea 1,553.

Nigeria has recorded eight deaths and there has been one fatality in Mali and one in the US.

In the US, the governors of the states of New York and New Jersey have ordered a mandatory 21-day quarantine period for all doctors and other travellers who have had contact with Ebola victims in West Africa.

Anyone arriving from affected West African countries without having had confirmed contact with Ebola victims will be subject to monitoring by public health officials.

The first person to be quarantined under the rules was a female health worker who arrived at Newark Liberty International Airport Friday.

She had no symptoms then but has since developed a fever and is being monitored.