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Friday, April 19, 2013

How the Post Office Sniffs Out Anthrax Before It Hits Your Mailbox

Development of the Biological Detection System began in 2002 when the USPS outlined the basic functions such a system would need, based on the agency's consultations with Joint Projects Office (JPO) and the SBCCOM (US Army Soldier Biological Chemical Command). No existing system was capable of what the USPS needed, so the postal service set about developing one that did. Or at least Northrop Grumman did, in coordination Smiths Detection. Northrop adapted aspects of more than 20 systems already in use by the US military for biological warfare tests to the specific needs of the USPS. The US Army Research Institute of Infectious Disease (USARIID) Navy Medical Research Center, NIST, Dept of Agriculture, and John Hopkins University all helped vet the system's performance before its initial test run in a Baltimore-area mail processing center in late 2002.
How the Post Office Sniffs Out Anthrax Before It Hits Your MailboxAs mail travels through the Advanced Facer Caneler System, it travels under a small hood that draws in ambient air, transmitting it to an aerosol collector in the BDS cabinet. This collector concentrates the suspect particles in a sterile water solution and then automatically transfers it, along with a reagent to the PCR (polymerase chain reaction) unit. The PCR duplicates the biological sample's DNA and compares the result against a known sequences of Anthrax. If the test returns positive, the site controller is notified and the offending mail can be recovered for further inspection All this takes less than an hour and is performed on-site.
Since entering service in 2003, more than a thousand BSD units have been installed in mail centers around the country.
As of 2009, the BSDs had screened screened tens of billions of packages and completed a total of eight million tests—all without a false positive. That's an impressive figure, even if Anthrax is no longer the most fashionable pathogen.

How the Post Office Sniffs Out Anthrax Before It Hits Your Mailbox:

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