I don't have the Difco book here at home; however, it sounds like you had
either a typing error, handwriting error, or a translation problem. I
think you are probably looking for "Difco Bactone", and if I remember right
(been a few years since I used it) it is a pancreatic digest, but I
wouldn't swear to it. Try looking up Difco's manual on "Bactone" and see
if you have any better luck.