Spanish Health Minister Ana Mato has confirmed that a nurse who treated two victims of Ebola in Madrid has tested positive for the disease.
The nurse is said to be the first person in the current outbreak known to have contracted Ebola outside Africa.
The woman was part of the team that treated Spanish priests Manuel Garcia Viejo and Miguel Pajares, who both died of the virus, officials say.
Some 3,400 people have died in the outbreak - mostly in West Africa.
Meanwhile US President Barack Obama has said the White House is considering extra screening at US airports for people arriving from the worst-affected countries in West Africa.
He said the chances for an Ebola outbreak in the US were extremely low, but vowed to step up the pressure on larger countries to help with efforts to contain the disease.
It comes as the US tries to limit the spread from its first confirmed case, a Liberian in Dallas.
High fever
The Spanish nurse is in a stable condition, Ms Mato said. She started to feel ill last week when she was on holiday.
The nurse was admitted to hospital in Alcorcon, near Madrid, on Monday morning with a high fever, she said.
"Both the health ministry and public health authorities are working together to give the best care to the patient and to guarantee the safety of all citizens," the minister told a news conference.
Manuel Garcia Viejo, 69, died in the hospital Carlos III de Madrid on 25 September after catching Ebola in Sierra Leone.
Miguel Pajares, 75, died in August after contracting the virus in Liberia.
Experimental drug
Ebola spreads through contact with the bodily fluids of someone who has the virus and the only way to stop an outbreak is to isolate those who are infected.
There have been nearly 7,500 confirmed infections worldwide, with officials saying the figure is likely to be much higher in reality.
Guinea, Sierra Leone and Liberia have been hardest hit.
Thomas Duncan, the first person to be diagnosed with Ebola in the US, is being treated at a Dallas hospital in isolation. He caught the virus in his native Liberia.
Mr Duncan's condition is critical but stable, doctors said on Monday.
He has been given Brincidofovir, a new experimental drug for treating Ebola which was developed in North Carolina.
Ebola virus disease (EVD)
Symptoms include high fever, bleeding and central nervous system damage
Spread by body fluids, such as blood and saliva
Fatality rate can reach 90% - but current outbreak has mortality rate of about 70%
Incubation period is two to 21 days
There is no proven vaccine or cure
Supportive care such as rehydrating patients who have diarrhoea and vomiting can help recovery
Fruit bats, a delicacy for some West Africans, are considered to be virus's natural host
Latest Stories
-
Dext Technology partners KNUST to train basic school teachers on STEM
16 mins -
My efforts led to remarkable transformation in Appiatse – Lands Minister
18 mins -
13th Ghana Information Technology and Telecom Awards launched
33 mins -
Comedy of electioneering campaign policy: NDC’s 24-hour economy tricks
40 mins -
We will remain vigilant in our oversight operations of all financial institutions – Governor
41 mins -
Ghana’s economic recovery has been strong and steady – Finance Minister
43 mins -
Government completes 50 premix fuel automation machines at landing sites – Fisheries Minister
51 mins -
FBNBank changes its name to FirstBank Ghana
58 mins -
Akwaboah Jnr ties the knot
1 hour -
Women’s FA Cup semis: Army Ladies face FC Epiphany; Police Ladies up against Supreme Ladies
2 hours -
Police haul in Kwadaso MP, EC officials in probe of Ejisu by-election ‘bribery’ case
3 hours -
Ghana’s press freedom ranking: Are we actually improving?
4 hours -
Reflections: 50 Lessons at 50
5 hours -
NCCE briefs Council of State on civic plans for 2024
5 hours -
Ecobank Group reports Profit Before Tax of $581m, on net revenue of $2.1bn for 2023
5 hours