An item impregnated with a standardized quantity of a chemical agent(s) for the differentiation of certain groups of microorganisms (presumptive differentiation). For discs used for sensitivity testing, see sensitivity discs, diagnostic.
Classification: Diagnostic or lab reagents on a backing, prepared diag/lab reagents whether or not on a backing, not of heading 3002 or 3006; certified ref materials
NSN 6220-00-635-8818
NSN 2925-00-953-2920
NSN 5935-01-578-1597
NSN 2925-01-182-0227
NSN 6135-01-368-2785
NSN 4140-01-371-1565
NSN 5920-00-484-0377
NSN 5930-00-239-7650
NSN 5935-01-634-0668
NSN 6135-01-142-6456
NSN 6645-00-784-8288
NSN 5930-01-089-8615