laboratory diagnostic - testing and comparison - biological samples and assessment reports - quality control - internal - reference strains - qualitative - Staphylococcus aureus, equivalent collections 6538P, NCTC 7447, WDCM 00033, vial x10 discs, keep at freezer, C.F.U between 10^6-10^9, freeze-dried, water-soluble, used in solid or liquid media, code L37RS1053-10, todylaboratories®