Use the NSI proficiency testing (PT) studies to help improve quality and comply with regulations. Receive your final reports within 21 days of the study close date.

If you have an immediate need for proficiency test results, PT Express™, our on-demand proficiency testing is available year-round. Call us at 1-800-234-7387 to place your order.

This three-sample set contains L. monocytogenes plus two nonpathogen, non-listeria organisms. Each vacuum-sealed glass vial contains a culture pellet lyophilized in Microgel-Flash™ matrix. Simply hydrate with supplied hydration fluid. The culture pellet dissolves almost instantly with minimum agitation and no incubation. Report present or absent for L. monocytogenes for each sample in the set. Three different series available per study.

Lead time specified is for studies that have already opened. The lead time for studies that have not yet opened will be applicable once the study opens. To view study numbers and corresponding study dates, please see the 2024 Proficiency Testing Study Schedule linked under the Resources section below.