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Dead Bacteria Terror Tests Begin on MBTA Red Line on Wednesday

The bacteria, a harmless strain used in human food supplements, will be spread when the T is closed. It's a test of bio-terror sensors.

The MBTA and Homeland Security plan to release dead bacteria into three Red Line stations this summer to test bioterror sensors. The tests begin Wednesday morning at 1 a.m., according to Fox 25.

The bacteria, bacillus subtilis, is not infectious even in its live form, according to government documents. The bacteria is used in farming, as a food supplement for humans and livestock and as an ingredient in organic dog food, according to a government Q&A which is attached as a PDF.

The tests will be done in Somerville and Cambridge at the Davis, Harvard Square and Porter Stations. The tests will continue throughout the year, according to Fox 25.

Some residents who attended a May public hearing at the Cambridge YMCA expressed concern about the plan.

The bacteria would be released when the stations are closed to the public. The government had rejected a plan to release live bacteria at rush hour, to simulate more closely how an actual attack would likely take place. However, that option was rejected because of the possible danger to "immune-compromised riders." For details, please see a second attached PDF with the government's analysis.

Biological attacks on subway systems have long been a concern. In 1995 a Japanese cult released nerve gas on the Tokyo subway system. The attack killed 12 people and injured 5,500.

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