Arrow Scientific biological indicators

Biological indicators (BI) provide the best assurance of sterility by challenging the steriliser with quantifiable, highly resistant Geobacillus stearothermophilus spores.

A system available from Arrow Scientific includes rapid readout biological indicators, disposable test packs, auto-readers and record keeping. Biological indicators are used for load control monitoring, which is the process by which a load is monitored and released based on the result of a biological indicator.

Self-contained BI for 121°C gravity or 132°C vacuum-assisted cycles consist of a Bacillus stearothermophilus spore strip, sealed glass ampoule with growth medium and dual indicator system.

After sterilisation, the vial is crushed to join the growth media with the processed spore strip. The BI is incubated for 3 h at 60°C in the Attest auto-reader for a fluorescent reading. A red light indicates an unambiguous positive result or sterilisation failure.

The auto-reader, which is used with the rapid readout steam biological indicators, reduces quarantine time, allowing for quick and efficient detection of sterilisation process failure (1 to 4 h).

The product is self-contained, reducing the risk of false positives due to contamination. It conforms to ISO 11138.