What is the function of sterilization indicators (Process and Biological Indicators) in the sterilization process?

• A. Process indicators confirm a cycle occurred; Biological indicators verify that the cycle achieved necessary sterility
• B. They measure temperature only
• C. They show color change for humidity
• D. They indicate packaging integrity

Answer: (C)

Sterilization indicators provide two levels of verification to ensure a sterilization cycle is both performed and effective. Process indicators are designed to show that a cycle has run and that the load was exposed to the sterilizer’s parameters; they typically change color or display a signal when the cycle is completed. Biological indicators take it a step further by testing whether those conditions actually achieved sterility, using resistant spores that are incubated after the cycle to see if any growth occurs. If there is no growth, you have evidence the cycle reached the necessary sterility level. This combination is why the best answer emphasizes both cycle completion and sterility achievement. The other statements don’t fit: temperature is checked by dedicated monitoring devices, humidity changes aren’t what these indicators measure, and packaging integrity is evaluated through separate tests and visual checks rather than these indicators.