A sign marks the entrance to the federal Centers for Disease Control and Prevention, Tuesday, Oct. 8, 2013, in Atlanta. The government shutdown has slowed or halted federal efforts to protect Americans' health and safety, from probes into the cause of transportation and workplace accidents to tracking the flu. The latest example: investigating an outbreak of salmonella in chicken that has sickened people in 18 states. The CDC has recalled some of its furloughed staff to deal with the salmonella outbreak, which has sickened more than 270 people and was announced by the Agriculture Department late Monday. (AP/David Goldman)
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NEW YORK (AP) -- A government scientist kept silent about a potentially dangerous lab blunder and revealed it only after workers in another lab noticed something fishy, according to an internal investigation.
The accident happened in January at the headquarters of the Centers for Disease Control and Prevention in Atlanta. A lab scientist accidentally mixed a deadly strain of bird flu with a tamer strain, and sent the mix to another CDC lab and to an outside lab in Athens, Georgia.
No one was sickened by bird flu. But unsuspecting scientists worked with the viral mix for months before it was discovered.
CDC officials have called the incident the most worrisome in a series of lab safety problems at the government agency, long regarded as one of the most respected public health agencies in the world. Earlier this summer, a lab mishandled anthrax samples and both the bird flu and anthrax labs were shut down.
"We all feel horrible this happened," said Dr. Anne Schuchat, who oversees the CDC's Influenza Division - which includes the lab where the bird flu accident took place.
Because of employee privacy rules, she said she could not name the lab scientist or the leader of the scientist's team, who were both faulted in the investigation report released Friday. She said disciplinary actions are taking place, but she did not provide any details.
CDC's release of the report is one of many signs the agency is trying to make things right, said Dr. William Schaffner, an infectious disease expert at Vanderbilt University. But he added that the CDC should at least disclose any disciplinary measures, to reassure the public that the agency is taking the matter seriously.
According to the report, the lab scientist was doing work with both bird flu strains — the deadly form and a tamer version. Lab rules call for them to be handled separately, and the tasks should take at least 90 minutes.
The CDC investigation found the work was completed in 51 minutes. That's a clear indication the scientist took short-cuts, Schuchat said.
The lab scientist told investigators that the work was done in the proper sequence, but noted being rushed to finish the job and attend a meeting. CDC officials say it's possible the scientist worked on both strains at the same time.
In February, some of the mixed virus sample was sent to another CDC lab in Atlanta. In March, a shipment of it went to a U.S. Department of Agriculture laboratory in Athens. For a study, the bird flu virus was given to chickens. The chickens died, prompting USDA staff to take a hard look at the sample and detect the deadly strain.
The USDA lab notified the CDC lab in May, and the CDC lab confirmed the finding.
But the CDC team leader didn't report what happened to supervisors or anyone else, reasoning that the viral mix was at all times contained in specialized laboratories and was never a threat to the public, the investigation report said.
CDC officials were only notified in June after the second CDC lab reported a problem with its sample. Two weeks later, CDC Director Dr. Tom Frieden was notified.
Frieden ordered the flu and anthrax labs closed, an internal review and other steps. The anthrax lab director resigned last month.
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