Abstract
The Salmonella CANARY® Zephyr assay is designed to provide rapid and reliable detection of Salmonella enterica from various types of environmental surfaces, including stainless steel, silicone rubber, high-density polyethylene (HDPE), and glazed ceramic. The assay is using cell- and immuno-based CANARY technology and tested on Smiths Detection's Zephyr platform. The objective of this validation study was to evaluate the Salmonella CANARY Zephyr assay for its inclusivity/exclusivity, matrix study for 4 claimed environmental surfaces, consistency/stability, and robustness. The Salmonella CANARY Zephyr assay was compared to the U.S. Food and Drug Administration Bacteriological Analytical Manual (BAM) Chapter 5 "Salmonella" using an unpaired study design for environmental surfaces including stainless steel, silicone rubber, HDPE, and glazed ceramic (1" × 1" test area). For the inclusivity and exclusivity evaluation, the Salmonella CANARY Zephyr assay correctly identified 101 out of 102 target organism isolates (with one strain of S. enterica subsp. indica not detected) and excluded all 33 non-target strains that were analyzed. For the matrix study, the Salmonella CANARY Zephyr assay demonstrated no statistically significant differences between presumptive and confirmed results or between candidate and reference method results. Probability of detection analysis of the Salmonella CANARY Zephyr method on robustness and product consistency/stability (lot-to-lot) study demonstrated no statistically significant differences. The Salmonella CANARY Zephyr assay is an effective method for the detection of Salmonella enterica from various environmental surfaces including stainless steel, silicone rubber, HDPE, and glazed ceramic. The Salmonella CANARY Zephyr assay allows for rapid and sensitive detection of Salmonella enterica on environmental surfaces. It only takes less than 5 min to prepare the sample and 1 min for instrument running/reading.
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