Director of Centers for Disease Control and Prevention Dr. Tom Frieden speaks during a news conference after confirming that a patient at Texas Health Presbyterian Hospital has tested positive for Ebola, the first case of the disease to be diagnosed in the United States. (AP Photo/John Bazemore)
(Bloomberg) — The first case of deadly Ebola diagnosed in the U.S. has been confirmed in Dallas, in a man who traveled from Liberia and arrived in the U.S. on Sept. 20, the Centers for Disease Control and Prevention said.

The man is being kept in isolation in an intensive care unit. He had no symptoms when he left Liberia, then began to show signs of the disease on Sept. 24, the CDC said yesterday. He sought medical care on Sept. 26, was hospitalized two days later at Texas Health Presbyterian and is critically ill, said Thomas Frieden, director of the CDC.

Frieden said the agency is working to identify anybody who had contact with the man and track them down. “There is no doubt in my mind that we will stop it here,” he said at a press conference in Atlanta.

The CDC has a team of epidemiologists on the way to Texas, he said. The team will follow anyone who has had contact with the man for 21 days. If they develop any symptoms, they’ll immediately be isolated, and public health officials will trace their contacts. The diagnosis was first confirmed by a Texas lab based on samples of the man’s blood and confirmed by the CDC.

The man was traveling to the U.S. to visit family here and was staying with them. He was exposed to only a “handful” of people during the time when he had symptoms, including family members and possibly some community members, according to Frieden, who said there was little risk to anyone on a flight with the man.

Low Risk

“Ebola doesn’t spread before someone gets sick, and he didn’t get sick until four days until after he got off the airplane,” Frieden said. “So we don’t believe there was any risk to anyone on the flight at that time.”

The patient wasn’t involved in helping contain the Ebola outbreak effort, according to Frieden, who declined to give further details on the man’s nationality or travels. CDC researchers said becauseEbola is spread through human fluids, he had to have had close contact with someone in Liberia who had the disease or had recently died from it.

After the patient sought medical care on Sept. 26 and was sent home with antibiotics, he returned in an ambulance to Texas Health Presbyterian two days later and was admitted, said Edward Goodman, an epidemiologist at the hospital. The ambulance workers and other health-care professionals who treated him are being monitored for symptoms, Goodman said.

The CDC and Texas doctors are discussing the use of possible experimental treatments, Frieden said, though no decision has been made.

Obama Briefed

President Barack Obama was briefed about the patient by Frieden, the White House said in a statement. They discussed the patient’s treatment and what was being done to trace the people the man might have contacted.

U.S. authorities didn’t disclose the flights or airlines the patient took from Liberia. No airlines serve Africa from Dallas/Fort Worth International Airport, the main domestic and foreign gateway to North Texas, and none of the major U.S. carriers with overseas networks — American Airlines Group Inc., United Continental Holdings Inc. and Delta Air Lines Inc. — flies to Liberia. Delta dropped operations last month in Monrovia, the country’s capital.

That left open the possibility the traveler arrived in the U.S. from somewhere else in Africa or via a connection in Europe, and may have stopped elsewhere on a domestic flight before reaching Dallas.

Another suspected Ebola case is being evaluated at a National Institutes of Health facility, U.S. officials said, the 13th such possible infection in the U.S. All others have tested negative.

Family Contact

A traveler from Africa showing up in the U.S. with Ebola “is not at all surprising,” said Michael Osterholm, director of the Center for Infectious Disease Research and Policy at the University of Minnesota. “We are going to see more cases show up around the world.”

Osterholm said that while it is possible the patient may have infected other family members or close contacts before he was diagnosed, it is unlikely there will be any more people infected with Ebola in the U.S. as a result of the case, thanks to good infection control procedures here.

“There shouldn’t be any new infections from this point on,” Osterholm said. “We are going to shut this down.”

The Ebola outbreak has been concentrated in the West Africa countries of Liberia, Sierra Leone and Guinea. The outbreak has infected 6,574 and killed 3,091 people so far, according to the World Health Organization. U.S. public health officials have been isolating and testing travelers who returned from the region with symptoms of the disease.

Vast Differences

“This incident shows the vast differences between our health system and what’s available in West Africa,” said Celine Gounder, an infectious disease doctor and a former assistant commissioner in the New York City Department of Mental Health and Hygiene. “The patient was isolated quickly. By isolating the contacts, we can eliminate risk of further spread.”

The latest cases come after at least three American aid workers who were diagnosed with Ebola in Africa were evacuated to U.S. hospitals, treated and discharged.

There is no approved treatment for Ebola, though drugmakers are attempting to develop vaccines or medicines that could be used in this or a future outbreak. Current care involves isolating the patient so they can’t infect others, and providing supportive treatment such as intravenous fluids and antibiotics to fight opportunistic infections.

U.S. health officials have downplayed the chance of a major outbreak of the disease in the U.S., saying the country’s superior medical infrastructure would be able to quickly isolate the disease.

‘Not in the Cards’

“It’s not a potential of Ebola spreading widely in the U.S.,” Frieden said on a July 31 conference call with reporters. “That is not in the cards.”

U.S. and European governments have been criticized for being slow to respond to the situation in Africa, and much of fight against the outbreak has been conducted by missionary and charitable groups with personnel on the ground, including Doctors Without Borders, Samaritans Purse and SIM USA. The groups have said they are overwhelmed, don’t have enough beds to treat patients and the outbreak is rapidly growing out of control.

Troop Effort

The U.S. Department of Defense has authorized sending 1,400 troops to Liberia to help fight Ebola in Western Africa, where the virus has crippled existing medical infrastructure.

The troops will supervise the construction of Ebola treatment units, conduct site surveys and provide engineering expertise, John Kirby, a press secretary for the department said yesterday at a news briefing. Half of the troops will come from the 101st Airborne Division while the remaining 700 will come from different parts of the Army.

The pledge to send troops was part of the U.S. effort to contain the spread of Ebola virus, and governments and international aid groups are sending money and personnel to help fight help outbreak. Leaders in Sierra Leone, Liberia and Guinea urged the international community to do more to keep the epidemic, the worst in history, from killing their people and harming their economies.

–With assistance from Shannon Pettypiece in New York, Darrell Preston, Ed Dufner and Thomas Black in Dallas, Michael Buteau and Michael Sasso in Atlanta and Angela Greiling Keane in Washington.