B. Sporothermodurans CBMAI 148 and CBMAI 155, obtained from the Brazilian Collection of Micoorganisms Environment and Industry UNICAMP-CPQBA, and Bacillus cereus ATCC 33018, derived from the American Type Culture Collection, were cultivated in BHI broth (Brain Heart Infusion) (Merck, Darmstadt, Germany) at 37 for 24 h.