Best indicator for sterilization by autoclaving ?
Ans. is 'b' i.e., Geobacillus Biological indicators Biological indicators are standardised preparations of microorganisms used to assess the effectiveness of a sterilization process. They usually consist of a population of bacterial spores placed on an ine carrier, for example a strip of filter paper, a glass slide or a plastic tube. Most commonly, spores of Bacillus stereothermophilus (Geobacillus stearothermophilus) are used. Spores of Bacillus subtilis and Bacillus pumilis are alse used.
Bacillus subtilis
Geobacillus
Bacillus pumilis
Clostridium