laboratory diagnostic - testing and comparison - biological samples and assessment reports - quality control - internal - reference strains - qualitative - Rhodococcus equi, equivalent collections 6939, NCTC 1621, WDCM 00028, 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 L37RS1045-10, todylaboratories®, expires 2025.09