Direct information on killing B. anthracis spores in foods by cooking is scarce, and the complexity of food matrices precludes easy extrapolation of the laboratory data into nonfood matrices. However, information on inac- tivating spores of bacterial species more resistant to envi- ronmental conditions than B. anthracis can provide guid- ance. The spores of Clostridium botulinum are more resist- ant to heat inactivation than are B. anthracis spores (4). The commercial retort process of canning achieves a 12- log reduction of C. botulinum spores, and by extension, should achieve a similar killing rate for B. anthracis spores. Further research in this area is needed.