Microbiology General 525df528 Which of the following is used to test the efficiency of sterilization in an autoclave? A Clostridium tetani B Bacillus stearothermophilus C Bacillus pumilus D Bacillus cereus High-Yield Explanation Autoclave: B. stearothermophillus Hot air oven: Clostridium tetani nontoxigenic strain