Evaluation of the effectiveness of the sterilization process through the lethality achieved on a population of Geobacillus stearothermophillus ATCC 7953 inoculated on different types of support.rVials: Spores inoculated on a disc located at the bottom of the vial. It requires an activation of it so that the spores come into contact with the environment. Commonly used in routine sterilizations.rAmpoules: Glass vial with culture medium where the spores are dispersed. Indicated for the sterilization of liquids by steam.rStrips: Strips with spores. Incubation in a specific culture medium with color shift is necessary for rapid results (24-48 hours).