Use the NSI proficiency testing (PT) studies to help improve quality and comply with regulations. There are no limits on the number of analysts or number of methods that you may report. Receive your final reports within 21 days of the study close date.

These food microbiology proficiency tests provide the quantitative determination of target microorganisms by standardized cultural methods. 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. If applicable add meat or dairy matrix to the solution.

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.

When prepared according to the instructions, the concentration range for the following seven analytes will be:

APC: 2,500 to 500,000 CFU/pellet
Total Coliform: 2,000 to 400,000 CFU/pellet
E. coli: 1,000 to 200,000 CFU/pellet
S. aureus: 5,000 to 100,000 CFU/pellet
Enterobacteriaceae: 2,500 to 400,000 CFU/pellet
Yeast: 5,000 to 100,000 CFU/pellet
Mold (if present): 500 to 100,000 CFU/pellet

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.