Were the DC protesters victims of bio-terrorism?

Sept. 30, 2005 -- A relatively rare biological agent has been detected in air filters serving Washington D.C. in recent weeks, ABC News has learned -- but current evidence does not show any indication whatsoever of terrorism.

The federal government found six air filters around the nation's capital checked on Sept. 24 and 25 contained "trace amounts" of tularemia, a type of bacteria.

And more:

http://www.wtopnews.com/index.php?nid=25&sid=581709

WASHINGTON - Authorities are trying to determine whether homeland security was breeched during protests for and against the war in Iraq that took place downtown last weekend.
D.C. Health Director Dr. Gregg Pane tells WTOP Radio that bio-watch collectors, operated by the Department of Homeland Security, tested positive during demonstrations that took place downtown.

D.C. officials were notified of this on Friday.