Profile: Microtest Laboratories, Inc. deals with science testing and pharmaceutical contract manufacturing. We focus on areas such as analytical chemistry, microbiological & virological laboratories, class 100 cleanrooms; on-site steam and EtO sterilization and depyrogenation capabilities as well as purified water systems & voice/data systems. We are accredited with ISO 9001:2000 certification. Our medical testing service includes reusables, endotoxin, ethylene oxide sterilization validation and sterility. Our reusables include chemical sterilization, cleaning studies and low-level disinfection. Direct transfer methods such as bacteriostasis/fungistasis testing through product immersion are most commonly recommended for sterility testing of medical devices. Biological indicators are filter strips impregnated with bacillus atrophaeus spores.