Single-dose lyophilised pellets containing a certified inoculum of one compendial organism per vial. Each pellet is formulated for single-use reconstitution, eliminating the risk of carry-over contamination between test events and ensuring complete per-test traceability as required by pharmacopoeial method suitability frameworks. Ideal for targeted single-organism QC, in-process controls, and any application where a fresh, enumerated inoculum must be prepared independently for each test.