The indicator used in the autoclave is?
Sterilization control: for determining the efficacy of moist heat sterilization, spores of Bacillus stearothermophilus are used as the test organism. This is a thermophilic organism with an optimum growth temperature of 55-60oC and its spores require exposure of 12 minutes at 121oC to be killed REF:Ananthanarayan & Panicker's Textbook of Microbiology 8th edition pg no:34
Clostridium tetani
Bacillus stereothermophilus
Bacillus pumilis
Bacillus subtilis Var Niger
general microbiology