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Capitol Hill Anthrax Matches Army's Stocks: 5 Labs Can Trace Spores to Ft. Detrick Fair Use Statement
In depth: Germs: Biological Weapons and America's Secret War
Source: Washington Post
Capitol Hill Anthrax Matches Army's Stocks 5 Labs Can Trace Spores to Ft. Detrick
By Rick Weiss and Susan Schmidt Washington Post Staff Writers Sunday, December 16, 2001; Page A01
Genetic fingerprinting studies indicate that the anthrax spores mailed to Capitol Hill are identical to stocks of the deadly bacteria maintained by the U.S. Army since 1980, according to scientists familiar with the most recent tests.
Although many laboratories possess the Ames strain of anthrax involved in this fall's bioterrorist attacks, only five laboratories so far have been found to have spores with perfect genetic matches to those in the Senate letters, the scientists said. And all those labs can trace back their samples to a single U.S. military source: the U.S. Army Medical Research Institute of Infectious Disease (USAMRIID) at Fort Detrick, Md.
'That means the original source [of the terrorist material] had to have been USAMRIID,' said one of the scientists.
Those matching samples are at Fort Detrick; the Dugway Proving Ground military research facility in Utah; a British military lab called Porton Down; and microbial depositories at Louisiana State University (LSU) and Northern Arizona University. Northern Arizona University received its sample from LSU, which received its sample from Porton Down. Dugway and Porton Down got their samples directly from USAMRIID.
In another development yesterday, government health officials said they planned to recommend that about 3,000 people who were exposed to anthrax, including hundreds of Washington postal and Capitol Hill workers, be offered an experimental vaccine as a precaution in case antibiotic treatment alone failed to protect them from getting sick.
The FBI's investigation into the anthrax attacks is increasingly focusing on whether U.S. government bioweapons research programs, including one conducted by the CIA, may have been the source of deadly anthrax powder sent through the mail, according to sources with knowledge of the probe. The results of the genetic tests strengthen that possibility. The FBI is focusing on a contractor that worked with the CIA, one source said.
But it remains unknown which lab may have lost control of the material that apparently ended up in terrorist hands. One of the two scientists familiar with the genetic testing, who has been advising the government on the anthrax scare, said investigators still know little about security at Porton Down, though they have no reason to suppose it has been inadequate. Of the domestic labs, Dugway has attracted the most attention from the FBI, he said.
Dugway is also the only facility known in recent years to have processed anthrax spores into the powdery form that is most easily inhaled.
Scientists have known for some time that bacteria used in the terrorist attacks belong to the Ames strain, a variant of the anthrax bacterium, Bacillus anthracis, that was first isolated from a cow in Iowa and has been under study by military scientists for decades. But the Ames strain comes in various subtypes that can be distinguished from one another by detailed tests on the microbe's genes.
The genetic fingerprinting finding was made by a research team led by geneticist Paul Keim at Northern Arizona University in Flagstaff, which has been comparing the Ames strain bacteria found in the Senate letters to other Ames strain samples retrieved from nature and from various university and government laboratories.
'That's good detective work in the sense of determining the origins; this will narrow the search for the people who had access to the strain,' said Jennie Hunter-Cevera, a microbiologist and president of the University of Maryland Biotechnology Institute.
Other experts were cautious, noting that it is possible that the exact subtype of the Ames strain could have originated elsewhere
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