This  was included in a recent e-mail from Clark..

"Dr. Clark has published four frequency bands for Bacillus anthracis in the 
frequency table of the Disease book, they are: 
Bacillus anthracis 393.5-398.05 
Bacillus anthracis (2nd range) 363.2-365.3 
Bacillus anthracis (3rd range) 359.4-370.5 
Bacillus anthracis spores 386.95-391.45 
These could be used with a frequency generator. "