Bacterial indicator for dry heat sterilization is ?
sterilization control Biological; the spore of a nontoxigenic strain of Clostridium tetani Bacillus subtilus subsp.niger are used microbiological test of dry heat efficacy REF:Ananthanarayan & Panicker's Textbook of Microbiology 9th edition pg no:30
Bacillus subtilis
Bacillus pumilis
Bacillus stearothermophilus
Coxiella burnetti
general microbiology