Mesa Labs offers a complete line of spore strips for sterility testing in various sterilization environments for both Healthcare and Industrial applications.
Mesa’s products are manufactured in accordance with USP and ISO Guidelines and the US Food & Drug Administration’s Quality System Regulations. Available in 100 count clear resealable bags.
Spore strips are in Schleicher & Schuell filter paper (#470) – size 6.4mm x 38.1mm – packaged in a peel open glassine paper pouch. Glassine paper is permeable to sterilant but resistant to moisture and air at ambient temperature/pressure. This allows the user to transport the strip within the glassine from the sterilizer to a laminar flow hood, where it can be transferred into recovery medium. Populations of strips are typically from 1.0 X 10n to 4.0 X 10n. Lot number and expiration date are printed on each glassine.

• Geobacillus stearothermophilus* – For use in steam sterilization at 121.1°C (250° F) to 135°C (275° F), and Chemiclave®. After exposure to sterilant, incubate strips at 55-60°C.
• Bacillus atrophaeus* – For use in Ethylene Oxide (600 mg/L) and Dry Heat Sterilization (D-value calculated at 160°C). After exposure to sterilant, incubate strips at 30-35°C.
• Combined Species Spore Strips – G. stearothermophilus* (105) and B. atrophaeus* (106) on each strip. For use in Steam, EO, Dry Heat or Chemiclave® sterilizers.

* Derived from recognized reference strains as specified within USP, ISO or EN guidelines. These products are not certified as being representative of the reference strain and they should therefore not be used where a reference culture is specified.