ProTest - Biological Indicator
ProTest is a self-contained Biological Indicator for use in either Steam or Ethylene Oxide (EO) sterilization. Each unit is made up of a plastic container with cap, a crushable glass ampoule with recovery media, and a paper strip inoculated with spores. ProTest is available for healthcare and industrial use.
The control unit should exhibit turbidity and/or a color change to or toward yellow. If the control unit does not show signs of growth, consider the test invalid.
A failed sterilization cycle is indicated by turbidity and/or a color change to or toward yellow. A test unit that retains its original color (green for ProTest EO and purple for ProTest Steam) indicates that sterilization parameters have been met.