The Ames strain came to wide public attention in association with the 2001 anthrax attacks . Seven letters mailed to media outlets and US Senators on September 18 , 2001 and October 9 , 2001 contained anthrax bacteria of this particular strain . This strain is a monomorphic disease , mutating slowly if at all
2001 anthrax attacks
2001 anthrax attacks
Ames strain