3M Attest biological indicators that monitor the effectiveness of the steam sterilization process and provide results within 48 hours
The self-contained BI for 250F/121C gravity and 270F /132C vacuum-assisted steam cycles consist of a Geobacillus stearothermophilus spore strip; sealed glass ampule with growth medium and a bromocresol purple pH indicator system; brown colour-coded cap with holes for sterilant penetration and a hydrophobic filter as a bacterial barrier and a chemical indicator on the label that changes from rose to brown when processed.
After sterilization, the vial is "crushed" to join the growth media with the processed spore strip
The BI is incubated for 48 hours for a visual change readout
A colour change to yellow indicates surviving spores and a positive result
Biological indicator vials are easy to use and interpret with visual colour readout in 48 hours
Self-contained biological indicators significantly reduce possibility of contamination, minimizing false positives and assuring more accurate results
They come in a standard packing of 100 units per box