Bacillus spizizenii ATCC® 6633™*

EZ-PEC™ ready-to-use quantitative QC microorganism preparations are specifically designed to provide the required microbial challenge concentrations for Antimicrobial Effectiveness Testing (AET) and Preservative Efficacy Testing (PET). When prepared and used according to the instructions, EZ-PEC™ delivers a final concentration of 1.0 × 10⁵ to 1.0 × 10⁶ CFU/mL in the product being tested, ensuring compliance with standard testing requirements. The microorganism strains are maintained at three or fewer passages from the reference cultures, providing reliable performance, consistency, and traceability for quality control applications.