GLOSSARY: Biological Indicators

Biological Indicators are defined as resistant microorganisms placed into or on various materials to confirm that a sterilization process is effective. Biological indicators are aquatic plant and animal life that are susceptible to specific types and levels of pollutants. They may for instance be placed within a filter in order to determine if a proposed autoclave cycle is effective. After autoclave, they are removed and culture tests are performed to see if the microorganisms were killed.