A biological indicator used to monitor steam sterilization most commonly contains spores of which organism?

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Multiple choice — select the best answer

ABacillus atrophaeus
BClostridioides difficile
CGeobacillus stearothermophilus
DStaphylococcus aureus

✓ Correct answer: C. Geobacillus stearothermophilus Geobacillus stearothermophilus spores are used to test steam and hydrogen peroxide sterilization because they are highly heat-resistant. Bacillus atrophaeus spores are used for dry-heat and ethylene oxide processes.

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A biological indicator used to monitor steam sterilization most commonly contains spores of which organism?

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