Background: Dairy products are common sources of Listeria outbreaks, and early detection of the pathogen is critical to prevent outbreaks of illnesses and financial losses for dairy producers. Objective: This study aimed to evaluate Sample6 Detect HT/L for effective detection of Listeria monocytogenes and L. innocua in ice cream. Methods: Performance of the Sample6 DETECT HT/L was compared with U.S. Food and Drug Administration (FDA) Bacteriological Analytical Manual (BAM) Chapter 10 method for detection of Listeria spp. in ice cream using an unpaired study design. Results: R2-enriched samples tested with Sample6 Detect HT/L performed as well as the reference method at all time points tested from 15 to 24 h. R2 is a proprietary blend for use with the test kit that helps with early detection. All the dPODC values (Sample6 Detect HT/L presumptive and confirmed results) equaled zero, indicating 100% concordance between the methods. Both Sample6 Detect HT/L and FDA BAM results showed low dPODC values, with confidence intervals indicating no significant differences between Sample6 Detect HT/L and reference method results. Conclusions: Sample6 Detect HT/L is suitable to detect Listeria spp. in ice cream, even with a 12 h enrichment. Sample6 Detect HT/L demonstrated equivalent detection of L. monocytogenes and L. innocua from R2-enriched samples as expected with 15 and 18 h enrichment when compared with the 24 h FDA BAM method for L. monocytogenes. Highlights: These results indicate that Sample6 Detect HT/L, primarily developed for environmental samples, can be used to detect Listeria spp. in ice cream with less incubation time, resulting in faster detection.
Background: Dairy products are common sources of Listeria outbreaks, and early detection of the pathogen is critical to prevent outbreaks of illnesses and financial losses for dairy producers. Objective: This study aimed to evaluate Sample6 Detect HT/L for effective detection of Listeria monocytogenes and L. innocua in ice cream. Methods: Performance of the Sample6 DETECT HT/L was compared with U.S. Food and Drug Administration (FDA) Bacteriological Analytical Manual (BAM) Chapter 10 method for detection of Listeria spp. in ice cream using an unpaired study design. Results: R2-enriched samples tested with Sample6 Detect HT/L performed as well as the reference method at all time points tested from 15 to 24 h. R2 is a proprietary blend for use with the test kit that helps with early detection. All the dPODC values (Sample6 Detect HT/L presumptive and confirmed results) equaled zero, indicating 100% concordance between the methods. Both Sample6 Detect HT/L and FDA BAM results showed low dPODC values, with confidence intervals indicating no significant differences between Sample6 Detect HT/L and reference method results. Conclusions: Sample6 Detect HT/L is suitable to detect Listeria spp. in ice cream, even with a 12 h enrichment. Sample6 Detect HT/L demonstrated equivalent detection of L. monocytogenes and L. innocua from R2-enriched samples as expected with 15 and 18 h enrichment when compared with the 24 h FDA BAM method for L. monocytogenes. Highlights: These results indicate that Sample6 Detect HT/L, primarily developed for environmental samples, can be used to detect Listeria spp. in ice cream with less incubation time, resulting in faster detection.
Authors: J A Vázquez-Boland; M Kuhn; P Berche; T Chakraborty; G Domínguez-Bernal; W Goebel; B González-Zorn; J Wehland; J Kreft Journal: Clin Microbiol Rev Date: 2001-07 Impact factor: 26.132
Authors: Adam C Joelsson; Ashley S Brown; Amrita Puri; Martin P Keough; Zara E Gaudioso; Nicholas A Siciliano; Adam E Snook Journal: J AOAC Int Date: 2015 Sep-Oct Impact factor: 1.913
Authors: Erin Crowley; Patrick Bird; Jonathan Flannery; M Joseph Benzinger; Kiel Fisher; Megan Boyle; Travis Huffman; Ben Bastin; Paige Bedinghaus; William Judd; Thao Hoang; James Agin; David Goins; Ronald L Johnson Journal: J AOAC Int Date: 2014 Mar-Apr Impact factor: 1.913
Authors: Andrea Ottesen; Padmini Ramachandran; Elizabeth Reed; James R White; Nur Hasan; Poorani Subramanian; Gina Ryan; Karen Jarvis; Christopher Grim; Ninalynn Daquiqan; Darcy Hanes; Marc Allard; Rita Colwell; Eric Brown; Yi Chen Journal: BMC Microbiol Date: 2016-11-16 Impact factor: 3.605