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BT20 / Self-contained Biological Indicator for Steam sterilization processes. Geobacillus stearothermophilus (ATCC® 7953) 10^5 or 10^6 spores per vial. Readout: 24 hours.
Monitoring vacuum-assisted and gravity air-displacement Steam Sterilization processes at 121-135 °C.
Instructions for use
If at 24 hours there is no color change in the processed indicators, a final negative result is obtained (the sterilization process was effective). The positive control indicator should show a purple to yellow color change for the results to be valid. NOTE: To extend the incubation time beyond 24 hours, we recommend using a humidified environment to prevent complete evaporation of the culture medium contained within the indicator.
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