STERIS Spordi® Biological Indicator Strips are specifically designed for determining the effectiveness of steam, ethylene oxide (EO) or dry heat. Each strip is made from special filter paper inoculated with both Bacillus atrophaeus (BA) and Geobacillus stearothermophilus (GST) bacterial spores. The strips are sealed in clearly identified sterilizable glassine packages. This minimizes inventory because one package of Spordi Biological Indicator Strips can be used to monitor the performance of steam, EO and dry heat sterilizers.