Team seeks anyone who encountered Ebola patient

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Team seeks anyone who encountered Ebola patient
A man pushes a wheelbarrow containing a woman thought to be a victim of the Ebola virus at the Ebola treatment centre at Island hospital in Monrovia on October 2, 2014. Liberian President Ellen Johnson Sirleaf said Wednesday the Ebola outbreak that has devastated her country was showing signs of stabilising as the official death toll rose again.. AFP PHOTO / PASCAL GUYOT (Photo credit should read PASCAL GUYOT/AFP/Getty Images)
DALLAS, TX - OCTOBER 04: Eric Williams (C) , a U.S. Congressional candidate, Steve Oriabure (L), from the Organization of Nigerian Nationals, and Shadiya Abdi speak to the media outside the Ivy Apartment complex where the confirmed Ebola virus patient was staying on October 4, 2014 in Dallas, Texas. They spoke to the media on their concerns about how the Ebola case is affecting the community. (Photo by Joe Raedle/Getty Images)
A man leaves a wheelbarrow containuing a woman thought to be a victim of the Ebola virus at the Ebola treatment centre at Island hospital in Monrovia on October 2, 2014. Liberian President Ellen Johnson Sirleaf said Wednesday the Ebola outbreak that has devastated her country was showing signs of stabilising as the official death toll rose again.. AFP PHOTO / PASCAL GUYOT (Photo credit should read PASCAL GUYOT/AFP/Getty Images)
A man pushes a wheelbarrow containing a woman thought to be a victim of the Ebola virus at the Ebola treatment centre at Island hospital in Monrovia on October 2, 2014. Liberian President Ellen Johnson Sirleaf said Wednesday the Ebola outbreak that has devastated her country was showing signs of stabilising as the official death toll rose again.. AFP PHOTO / PASCAL GUYOT (Photo credit should read PASCAL GUYOT/AFP/Getty Images)
A man pushes a wheelbarrow containing a woman thought to be a victim of the Ebola virus, follwed by her relatives at the Ebola treatment centre at Island hospital in Monrovia on October 2, 2014. Liberian President Ellen Johnson Sirleaf said Wednesday the Ebola outbreak that has devastated her country was showing signs of stabilising as the official death toll rose again.. AFP PHOTO / PASCAL GUYOT (Photo credit should read PASCAL GUYOT/AFP/Getty Images)
A man pushes a wheelbarrow containing a woman thought to be a victim of the Ebola virus at the Ebola treatment centre at Island hospital in Monrovia on October 2, 2014. Liberian President Ellen Johnson Sirleaf said Wednesday the Ebola outbreak that has devastated her country was showing signs of stabilising as the official death toll rose again.. AFP PHOTO / PASCAL GUYOT (Photo credit should read PASCAL GUYOT/AFP/Getty Images)
DALLAS, TX - OCTOBER 02: A woman delivers bottled water and toilet paper to residents in a unit at the Ivy Apartments, where the confirmed Ebola virus patient was staying, on October 2, 2014 in Dallas, Texas. The first confirmed Ebola virus patient in the United States was staying with family members at The Ivy Apartment complex before being treated at Texas Health Presbyterian Hospital Dallas. State and local officials are working with federal officials to monitor other individuals that had contact with the confirmed patient. (Photo by Tom Pennington/Getty Images)
Thomas Duncan carries a woman HRS before she dies from #Ebola, then travels to TX. @CDCgov team now in Dallas. @AMHQ http://t.co/udwtA0eiGH
DALLAS, TX - OCTOBER 01: Texas Govenor Rick Perry answers questions related to the first confirmed case of the Ebola virus at Texas Health Presbyterian Hospital Dallas on October 1, 2014 in Dallas, Texas. State and local officials are working with federal officials to monitor other individuals that had contact with the confirmed patient. (Photo by Tom Pennington/Getty Images)
DALLAS, TX - SEPTEMBER 30: A general view of Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. The patient who had recently traveled to Dallas from Liberia marks the first case of this strain of Ebola that has been diagnosed outside of West Africa. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Dr. Edward Goodman, epidemiologist at Texas Health Presbyterian Hospital Dallas, answers questions during a media conference at Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Dr. Edward Goodman, epidemiologist at Texas Health Presbyterian Hospital Dallas, and Dr. Mark Lester, Southeast Zone clinical leader for Texas Health Resources, answer questions during a media conference at Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Dr. Edward Goodman, epidemiologist at Texas Health Presbyterian Hospital Dallas, and Dr. Mark Lester, Southeast Zone clinical leader for Texas Health Resources, answer questions during a media conference at Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: A general view of Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. The patient who had recently traveled to Dallas from Liberia marks the first case of this strain of Ebola that has been diagnosed outside of West Africa. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Traffic moves past Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. The patient who had recently traveled to Dallas from Liberia marks the first case of this strain of Ebola that has been diagnosed outside of West Africa. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Traffic moves past Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. The patient who had recently traveled to Dallas from Liberia marks the first case of this strain of Ebola that has been diagnosed outside of West Africa. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Dr. Edward Goodman, epidemiologist at Texas Health Presbyterian Hospital Dallas, and Dr. Mark Lester, Southeast Zone clinical leader for Texas Health Resources, answer questions during a media conference at Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Dr. Edward Goodman, epidemiologist at Texas Health Presbyterian Hospital Dallas, answers questions during a media conference at Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. The patient who had recently traveled to Dallas from Liberia marks the first case of this strain of Ebola that has been diagnosed outside of West Africa. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: A general view of Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. The patient who had recently traveled to Dallas from Liberia marks the first case of this strain of Ebola that has been diagnosed outside of West Africa. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Dr. Edward Goodman, epidemiologist at Texas Health Presbyterian Hospital Dallas, and Dr. Mark Lester, Southeast Zone clinical leader for Texas Health Resources, answer questions during a media conference at Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Traffic moves past Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. The patient who had recently traveled to Dallas from Liberia marks the first case of this strain of Ebola that has been diagnosed outside of West Africa. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Traffic moves past Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. The patient who had recently traveled to Dallas from Liberia marks the first case of this strain of Ebola that has been diagnosed outside of West Africa. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: A general view of Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. The patient who had recently traveled to Dallas from Liberia marks the first case of this strain of Ebola that has been diagnosed outside of West Africa. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: A medical transport van moves past Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the Ebola virus on September 30, 2014 in Dallas, Texas. The patient who had recently traveled to Dallas from Liberia marks the first case of this strain of Ebola that has been diagnosed outside of West Africa. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Dr. Edward Goodman, epidemiologist at Texas Health Presbyterian Hospital Dallas, explains the precautions taken to prevent the spread of the Ebola virus during a media conference at Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the disease on September 30, 2014 in Dallas, Texas. (Photo by Mike Stone/Getty Images)
DALLAS, TX - SEPTEMBER 30: Dr. Edward Goodman, epidemiologist at Texas Health Presbyterian Hospital Dallas, explains the precautions taken to prevent the spread of the Ebola virus during a media conference at Texas Health Presbyterian Hospital Dallas where a patient has been diagnosed with the disease on September 30, 2014 in Dallas, Texas. (Photo by Mike Stone/Getty Images)
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DALLAS (AP) -- A nine-member team of federal health officials is tracking anyone who had close contact with a man being treated for Ebola in a Dallas hospital, the director of the nation's top disease-fighting agency said Wednesday.

The team from the Centers for Disease Control is in Dallas to work with local and state health agencies to ensure that those people are watched every day for 21 days.

"If anyone develops fever, we'll immediately isolate them to stop the chain of transmission," CDC Director Tom Frieden said in an interview with The Associated Press.

The Dallas patient on Tuesday became the first case of Ebola diagnosed in the U.S. The unidentified man has been in isolation at Texas Health Presbyterian Hospital since Sunday. Health authorities have not revealed his nationality or age. He was listed in serious condition Wednesday.

Three members of the ambulance crew that transported the man to the hospital have tested negative for the virus and are restricted to their homes while their conditions are observed.

The man was vomiting when the ambulance got to the hospital, Dallas city spokeswoman Sana Syed said.

The ambulance crew is among 12 to 18 people being monitored after exposure to the man. Some are members of his family, but not all, Syed said.

Ebola symptoms can include fever, muscle pain, vomiting and bleeding, and can appear as long as 21 days after exposure to the virus. The disease is not contagious until symptoms begin, and it takes close contact with bodily fluids to spread.

Officials said there are no other suspected cases in Texas, but the diagnosis sent chills through the area's West African community, whose leaders urged caution to prevent spreading the virus.

The man left Liberia on Sept. 19, arrived the next day to visit relatives and started feeling ill four or five days later, Frieden said.

Stanley Gaye, president of the Liberian Community Association of Dallas-Fort Worth, said the 10,000-strong Liberian population in North Texas is skeptical of the CDC's assurances because Ebola has ravaged their country.

"We've been telling people to try to stay away from social gatherings," Gaye said Tuesday at a community meeting.

The CDC has not advised that people avoid large gatherings in this country.

The association's vice president warned against alarm in the community.

"We don't want to get a panic going," said vice president Roseline Sayon. "We embrace those people who are coming forward. Don't let the stigma keep you from getting tested."

Frieden said he didn't believe anyone on the same flights as the patient was at risk.

"Ebola doesn't spread before someone gets sick, and he didn't get sick until four days after he got off the airplane," Frieden said.

Four American aid workers who became infected in West Africa have been flown back to the U.S. for treatment after they became sick. They were treated in special isolation facilities at hospitals in Atlanta and Nebraska. Three have recovered.

A U.S. doctor exposed to the virus in Sierra Leone is under observation in a similar facility at the National Institutes of Health.

The U.S. has only four such isolation units, but Frieden said there was no need to move the latest patient because virtually any hospital can provide the proper care and infection control.

The man, who arrived in the U.S. on Sept. 20, began to develop symptoms last Wednesday and sought care two days later. But he was released.

At the time, hospital officials didn't know he had been in West Africa. He returned later as his condition worsened.

Blood tests by Texas health officials and the CDC separately confirmed his Ebola diagnosis Tuesday. State health officials described the patient as seriously ill.

Dr. Edward Goodman, an epidemiologist at the hospital, said the patient was able to communicate and was hungry.

The hospital is discussing if experimental treatments would be appropriate, Frieden said.

Passengers leaving Liberia pass through rigorous screening, the country's airport authority said Wednesday. But those checks are no guarantee that an infected person won't get through and airport officials would be unlikely to stop someone not showing symptoms, according to Binyah Kesselly, chairman of the Liberia Airport Authority's board of directors.

CDC officials are helping staff at Monrovia's airport, where passengers are screened for signs of infection, including fever, and asked about their travel history. Plastic buckets filled with chlorinated water for hand-washing are present throughout the airport.

Liberia is one of the three hardest-hit countries in the epidemic, along with Sierra Leone and Guinea.

Ebola is believed to have sickened more than 6,500 people in West Africa, and more than 3,000 deaths have been linked to the disease, according to the World Health Organization. But even those tolls are probably underestimates, partially because there are not enough labs to test people for Ebola.

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