Microbiology The biologic standard used to test the efficiency of sterilization involves the use of A Spores of Clostridium tetani B Streptococcus pneumoniae C Spores of Vibrio D Mycoplamsa 💡 Explanation The biologic standard used to test the efficiency of sterilization involves the use of ✓ Correct Answer: A. Spores of Clostridium tetani