API offers PT programs for labs performing microbiology and chemistry analyses on food products. Participants can select from a variety of programs and matrices to match the testing performed at their facility. The enrollment fee includes three shipments per year, easy-to-understand evaluation reports comparing your performance to other laboratories, and extra report copies sent to any management personnel who require them. Sample evaluation reports with an explanation of what they contain are available from the Learn More link on the left.

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Our catalog in PDF format contains details on the programs we offer and the analytes included in each program. Laboratories typically enroll for one year, which includes three test events with two samples in each. Mid-year enrollments are welcome; we will prorate prices to reflect the test events remaining. For information on how to order or whom to contact with questions, please click on the Distributor Locator link above.


NEW for 2017

Challenge Program – This is an educational (non-graded), detection and/or identification program designed for high performing laboratories testing multiple organisms in a variety of food matrices. The sample matrix and target organisms will vary from event to event. Please contact us for additional details.

Salmonella in 375g of milk – This program will be offered for the third event only and is targeted to laboratories testing pooled samples.

The HACCP Package has been expanded and will now be called the Environmental Package - this package, mimicking an environmental swab, will now include the option to enumerate Enterobacteriaceae and Yeast & Mold, as well as APC, Coliforms and E. coli. In addition, we are offering two new programs aimed at laboratories doing environmental testing: Environmental Salmonella Detection (qualitative) and Environmental Listeria (qualitative and quantitative). All of these programs are presented without a matrix.

Environmental Listeria – In order to maximize the comparison group for quantitative Listeria sp., in 2017 environmental Listeria reporting will be moved from the meat and milk Listeria programs to a separate program without a matrix. The new Environmental Listeria program will include the option to report detection and/or enumeration of environmental Listeria sp.

Added in 2016

Water Microbiology – Program has been discontinued.

Pseudomonas – Qualitative and quantitative tests for Pseudomonas sp. will be offered only in the third event of 2016.

Technician Competency – In 2016, Food Chemistry Proficiency Testing customers will also be able to submit up to four additional sets of results using the Technician Competency program on