PHOENIX — The medical record, from an Ebola case, made for grim reading, but Dr. Ian Crozier could not put it down. Within days of the first symptom, a headache, the patient was fighting for his life. He became delirious, his heartbeat grew ragged, his blood teemed with the virus, and his lungs, liver and kidneys began to fail.

“It’s a horrible-looking chart,” Dr. Crozier said.

It was his own. Dr. Crozier, 44, contracted the disease in Sierra Leone while treating Ebola patients in the government hospital in Kenema. He was evacuated to Emory University Hospital in Atlanta on Sept. 9, the third American with Ebola to be airlifted there from West Africa. He had a long, agonizing illness, with 40 days in the hospital and dark stretches when his doctors and his family feared he might sustain brain damage or die. His identity was kept secret at his request, to protect his family’s privacy.

Now, for the first time, he is speaking out. His reason, he said, is to thank Emory for the extraordinary care he received, and to draw attention to the continuing epidemic. He and his family granted their first interviews to The New York Times, and gave permission to interview his physicians.

His account offers glimpses of the hardships and dangers that have confronted doctors and nurses who volunteered to fight an epidemic that has claimed the lives of more than 330 health care workers — most of them African — and of the desperate need that has drawn them to the front lines. Dr. Crozier told of three brothers, just 4, 5 and 11, who fought for their lives on his ward in Kenema. Not long after, he lay near death in an isolation room at Emory, with his mother reading him poetry through an intercom.

Dr. Crozier, soft-spoken and genial, is now on the mend in Phoenix, where his parents and sister live. But the disease has taken its toll. Six-foot-5 and 220 pounds before he got Ebola, he has lost 30 pounds, much of it muscle. He tires easily, but has begun a grueling physical therapy program to rebuild wasted muscles.

“Ian was by far the sickest patient with Ebola virus that we’ve cared for at Emory,” said Dr. Jay B. Varkey, an infectious-disease specialist.

Doctors say his recovery has taught them that aggressive treatments, even life-support measures like ventilators and dialysis, can save some Ebola patients. Dr. Bruce S. Ribner, who leads the Emory team, said that until recently the general practice was not to bother intubating Ebola patients or put them on dialysis, because if they got that sick they were going to die.

“One of the things Ian taught us was, guess what, you can get sick enough to need those interventions and you can still walk out of the hospital,” Dr. Ribner said. “I think it has sent a message to our colleagues around the world.”