Name three types of sterilization indicators and their purposes.

• A. Chemical indicators (show exposure), biological indicators (confirm sterility via spore tests), integrators (verify multiple parameters).
• B. Thermal indicators, moisture indicators, and color-change stickers.
• C. Time indicators, air-flow indicators, packaging indicators.
• D. Chemical indicators (show color change only).

Answer: (A)

Monitoring sterilization relies on three kinds of indicators that address different aspects of the process. Chemical indicators are used to show that the package has been exposed to the sterilizing conditions, usually by a color change, giving a quick sign that the cycle reached the right heat or chemical parameters. Biological indicators go deeper: they test whether the validated conditions actually achieve sterility by using highly resistant spores and then incubating them to see if any survive. Integrators combine the verification of multiple parameters and provide a readout that the entire process, including time, temperature, and other critical factors, was met for the load. Together, this trio covers exposure, true sterility assurance, and overall process validation.

Other options don’t fit because they mix or omit standard categories. They may reference terms like moisture indicators, time indicators, or color-change stickers, which aren’t the established groups used for comprehensive sterilization monitoring.