Despite five days of intensive treatment, Thomas Eric Duncan’s condition was deteriorating.

Then, suddenly on Oct. 2, came a hopeful sign. Duncan was hungry.

Nurses at a Texas hospital raised the 45-year-old welder from Liberia into a sitting position and gave him a packet of saltine crackers and some Sprite.

Six days later, Duncan was dead. The first person ever to be diagnosed with the dreaded Ebola virus on U.S. soil was the first in this country to die of it.

Hundreds of pages of medical records provided to The Associated Press chart the disease’s relentless march through Duncan’s body. And they provide an unprecedented look at how Ebola killed despite the aggressive efforts doctors made to save him.

DOCTOR GETS MESSAGE

On Sept. 28, an ambulance carrying Duncan pulled into the emergency bay at Dallas’ Texas Health Presbyterian.

Not 55 hours earlier, Duncan had been at the hospital complaining of a headache and abdominal pain. His temperature spiked to 103 at one point, and on a scale of 1 to 10, he rated his pain as an 8.

Doctors ran tests, decided it must be sinusitis, sent him home with antibiotics and told him to follow up with a doctor the next day.

A nurse’s note said Duncan told her he recently had arrived from Africa. That information did not make it to the attending physician.

Now, Duncan was back, only this time his symptoms included vomiting and diarrhea. His temperature was 103.1 degrees.

This time, the nurse’s notes made it clear that Duncan had “just moved here from Liberia.” This time, the doctor got the message.

“I followed strict CDC protocol,” wrote Dr. Otto Javier Marquez-Kerguelen, referring to the U.S. Centers for Disease Control and Prevention guidelines for treating potentially infectious patients. Wearing a mask, gloves and full gown, Marquez-Kerguelen began his examination and took a history.

TESTING POSITIVE

Among the possible diagnoses: malaria, gastroenteritis, influenza and Ebola.

Duncan was put into isolation. The nurses notified county officials; the doctor called the CDC.

By evening, Duncan was suffering from explosive diarrhea, abdominal pain, nausea and projectile vomiting. Efforts to bring down his fever failed.

Because Duncan had recently traveled from Liberia, Dr. Gebre Kidan Tseggay noted, “Ebola virus disease should be high on the list” of differential diagnoses.

Blood tests showing damage to the liver and kidneys, and fluctuating blood sugar levels kept doctors scrambling. Tests ruled out influenza, hepatitis, parasites and C-diff, the germ notorious for spreading diarrhea in hospitals and nursing homes.

Finally, at 2 p.m. on Sept. 30, doctors received the confirmation that all had been dreading: “Patient has tested positive for Ebola …”

By Oct. 1, sepsis had set in.

Duncan tried to remain upbeat. He told his nurse he wanted to try solid food, then refused his lunch tray.

The next morning, Duncan told his attendants that his abdominal pain had lessened. He said he was “trying to keep up good spirits and ‘stay strong.’ ”

But there was now blood in his urine. Worried about his lung function, doctors added advanced antibiotics to Duncan’s medication.

That afternoon, he ate his crackers and drank less than 2 ounces of Sprite.

EXPERIMENTAL DRUG ARRIVES

By Oct. 3, the situation had turned dire.

Physicians contacted Chimerix, a small pharmaceutical research firm based in Durham, North Carolina. They wanted to try the firm’s experimental antiviral drug, brincidofovir.

The Food and Drug Administration gave its blessing.

Just after midnight Oct. 4, Duncan went into multiple organ failure. By morning, a shipment of brincidofovir arrived and Duncan got the first dose.

Monday morning, Duncan’s nephew, Josephus Weeks, was picking his way across Louisiana in a hail storm. Riding with him were his son, Josephus Jr., Duncan’s sister, Mai Wureh, and Duncan’s mother, Nowai Korkoyah.

After more than a week of listening to his uncle’s failing voice over the phone from his home north of Charlotte, North Carolina, Weeks decided it was time to go to him.

That evening, hospital staff escorted the family members to a room in the basement of Texas Presbyterian. The only way they would be allowed to see Duncan was via closed-circuit television.

“My son is dead!” Korkoyah cried out when she saw him. To Weeks, the immobile, expressionless face was “like a mask.”

Wednesday morning, nurses found Duncan’s heart rate had dropped into the 40s.

They administered drugs, but he was beyond help.

“No palpable pulse,” they noted, “time of death called.” It was 7:51 a.m.

His infectious body was cremated.