What device is used to test a sterilization method and contains highly resistant bacterial spores?

The device used to test a sterilization method that contains highly resistant bacterial spores is known as a biological indicator. This indicator serves as a crucial tool in verifying the efficacy of sterilization processes, particularly in methods like steam, dry heat, and ethylene oxide sterilization.

Biological indicators typically contain specific strains of bacteria that are known for their resistance to the sterilization process being tested. After the sterilization cycle is completed, the biological indicator is incubated to observe whether the spores have survived. If no growth occurs, it indicates that the sterilization method was effective. Conversely, if growth is observed, it suggests that the sterilization process was inadequate and that items may still harbor viable microorganisms.

Thermal indicators are used to confirm that specific temperatures were reached during the sterilization process but do not provide information on microbial kill rates. Chemical indicators change color in response to specific temperatures or conditions but, like thermal indicators, do not provide direct evidence of sterilization efficacy against microorganisms. An autoclave test pack can contain biological indicators among other indicators but does not specifically refer to the device itself used for testing sterilization efficacy.

Thus, the biological indicator is the definitive tool for assessing the effectiveness of sterilization methods, ensuring safety and compliance in practices such