A clinic monitors its steam autoclave weekly with a biological indicator. Spores of which organism are used for this purpose?

  • Correct answer

    Geobacillus stearothermophilus

  • Bacillus atrophaeus

  • Clostridium sporogenes

  • Bacillus anthracis

This question is one of 15 in AFK practice: Biomedical sciences. Test yourself on all of them.

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Explanations

  • Spores of Geobacillus stearothermophilus are highly resistant to moist heat and are the standard biological indicator for steam sterilization. Bacillus atrophaeus spores are used to monitor dry heat and ethylene oxide.

    Source: CDC, Guideline for Disinfection and Sterilization in Healthcare Facilities link — oneguy

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