Bacterial indicator for dry heat sterilization is ?: (A) Bacillus subtilis, (B) Bacillus pumilis, (C) Bacillus stearothermophilus, (D) Coxiella burnetti
Answer is A. 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