ATLANTA — A second American missionary stricken with Ebola is expected to be flown Tuesday to the U.S. for treatment, following a colleague who was admitted over the weekend to Emory University Hospital’s infectious disease unit.

A Liberian official confirmed to the Associated Press plans for Nancy Writebol to depart with a medical evacuation team. The official, Information Minister Lewis Brown, said the evacuation flight was scheduled to leave West Africa between 1 a.m. and 1.30 a.m. local time Tuesday.

Writebol is in good spirits despite her diagnosis, said the pastor of her hometown church in Charlotte, N.C., who has spoken with her husband, David.

“She is holding her own,” the Rev. John Munro said. Munro’s Calvary Church is a nondenominational evangelical congregation that sponsors the Writebols as missionaries in Liberia, one of the West African nations grappling with the worst outbreak of Ebola ever recorded there.