In Liberia, where the dead lay in the streets, lawmakers gathered to ratify a state of emergency while Sierra Leone sent troops to guard hospitals and clinics handling Ebola cases.
Nigeria held out hope it could receive an experimental US-developed drug to halt the spread of the virus.
Since breaking out earlier this year, the epidemic has claimed 932 lives and infected more than 1,700 people across west Africa, according to the World Health Organisation.
As African nations struggled with the sheer scale of the epidemic, Spain flew home a 75-year-old Roman Catholic priest, Miguel Pajares, who contracted the disease while helping patients at a hospital in the Liberian capital Monrovia.
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The missionary was the first patient in the outbreak to be evacuated to Europe for treatment.
A specially equipped military Airbus A310 brought him to Madrid's Torrejon air base along with a Spanish nun, Juliana Bonoha Bohe, who had worked at the same Liberian hospital but did not test positive for the deadly haemorrhagic fever, the Spanish government said.
The priest was stable and showing no sign of bleeding while the nun appeared to be well but would be re-tested for Ebola just in case, health officials said.
Two Americans who worked for Christian aid agencies in Liberia and were infected with Ebola while taking care of patients in Monrovia were taken back to the United States for treatment in recent days.
They have shown signs of improvement after being given an experimental drug known as ZMapp, which is hard to produce on a large scale.