OMAHA, Neb. >> A surgeon who contracted Ebola while working in Sierra Leone arrived in Nebraska Saturday for treatment at a biocontainment unit where two other people with the disease have been successfully treated.

Dr. Martin Salia, who was diagnosed with Ebola on Monday, landed at Eppley Airfield in Omaha on Saturday afternoon and was taken by ambulance to the Nebraska Medical Center.

The hospital said the medical crew that accompanied Salia, 44, from West Africa determined he was stable enough to fly, but that the team caring for him in Sierra Leone indicated he was critically ill and “possibly sicker than the first patients successfully treated in the United States.”

The disease has killed more than 5,000 people in West Africa, mostly in Liberia, Guinea and Sierra Leona. Of the 10 people treated for the disease in the U.S., all but one has recovered.

Salia’s ambulance to the hospital was accompanied by a single Nebraska State Patrol cruiser and a fire department vehicle — a subdued arrival in contrast to the August delivery of Dr. Rick Sacra, whose ambulance was flanked by numerous police cars, motorcycles and fire vehicles.

Salia has been working as a general surgeon at Kissy United Methodist Hospital in the Sierra Leone capital of Freetown. It’s not clear whether he was involved in the care of Ebola patients. Kissy is not an Ebola treatment unit, but Salia worked in at least three other facilities, United Methodist News said, citing health ministry sources.

Salia, a Sierra Leone citizen who lives in Maryland, first showed Ebola symptoms on Nov. 6 but tested negative for the virus. He eventually tested positive on Monday.

The U.S. State Department said it helped facilitate the transfer of Salia; the U.S. Embassy in Freetown said he paid for the expensive evacuation. The travel costs and care of other Ebola patients flown to the U.S. have been covered by the groups they worked for in West Africa.

Salia’s wife, Isatu Salia, said in a telephone interview that when she spoke to her husband early Friday his voice sounded weak and shaky. But he told her “I love you” in a steady voice, she said.

The two prayed together, and their children, ages 12 and 20, are coping, Isatu Salia said, calling her husband “my everything.”

Nebraska Medical Center spokesman Taylor Wilson said members of Salia’s family were not at the hospital Saturday, but were expected to arrive “in the near future.”

Sierra Leone is one of the three West Africa nations hit hard by an Ebola epidemic this year. Five other doctors in Sierra Leone have contracted Ebola, and all have died.

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Gresko reported from New Carrollton, Maryland.

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Associated Press writers Clarence Roy-Macauley in Freetown, Sierra Leone; Mike Stobbe in New York; and Matthew Barakat in McLean, Virginia, contributed to this report.