A Texas health care worker who treated a Liberian man who died of Ebola was wearing full protective gear but was infected with the dangerous virus anyway, health officials said this afternoon.
The caregiver, whose gender and identity were not revealed by Texas Health Presbyterian Hospital Dallas, tested positive for Ebola yesterday in a preliminary test.
The person is currently in the hospital, in isolation and in stable condition.
Director of the Centers of Disease Control and Prevention (CDC) Dr Thomas Frieden said there may be additional cases of Ebola among health workers, and a breach in protocol was to blame for the new infection.
A close contact of the health care worker, who CNN said was a female nurse, citing an unnamed official, has also been placed in isolation, officials said at a press conference.
Testing on this person is expected to be completed later today.
"This is not news that should bring about panic," said Dallas county judge Clay Jenkins.
"We expected that something - that it was possible that a second person could contract the virus."
The worker's family has requested total privacy, he added.
But Dan Varga, the chief clinical officer for Texas Health Resources, said officials were "very concerned" that the worker had apparently contracted the virus despite following safety protocol.
"This individual was following full CDC precautions," he said, noting that the gear would have included a mask, gown, and gloves.
Dr Varga said the health care worker came in contact with Thomas Eric Duncan, who died of Ebola on Wednesday, the second time he came to the hospital.
Mr Duncan was the first case of Ebola diagnosed in the United States.
He arrived from Liberia on 20 September, and began feeling sick about four days later.
He was initially sent home from a Dallas hospital on 25 September when he sought treatment for a fever an abdominal pain, even though he also told staff of his recent travel to Africa.
He returned by ambulance on 28 September to the same hospital.
Mr Duncan was estimated to have come in contact with about 100 people, and officials narrowed that pool down to 48 in the days after his infection was diagnosed.
The health care worker was not in the high risk group of people, Dr Varga said, but had been asked to check his or her temperature twice daily and report back if any signs of fever, according to a protocol approved by the CDC.
"This health care worker had been under the self-care monitoring regimen recommended by the CDC," said Dr Varga.
The person is the second case of Ebola diagnosed in the United States, as an epidemic spreads in West Africa that has killed more than 4,000 people since the beginning of this year.
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