Evaluate the performance of nucleic acid tests for determination of the presence of methicillin-resistant Staphylococcus aureus (MRSA) nucleic acids Formulated with purified, intact organisms Organisms are chemically modified to render them noninfectious Refrigerator stable—store between 2 and 8°C Purified protein matrix treated with 0.09% sodium azide NATtrol products are ready-to-use, inactivated full process controls designed to evaluate performance of molecular tests. They can be used for verification of assays, training of laboratory personnel and to monitor assay-kit lot performance. NATtrol products contain intact organisms and should be run in a manner similar to clinical specimens.