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Crowley ES, Bird PM, Torontali MK, Agin JR, Goins DG, Johnson R, Achen M, Balogh J, Barket D, Boatwright A, Clark M, Colon-Reveles J, Dixon K, Gorman; M, Hanson P, Husby G, Kelly M, Kim S, Koschmann C, Laflamme L, Larson C, Manner K, McCallum K, McClure; H, McMahon W, Mills J, Mohnke F, Moon B, Murphy M, Post L, Quast V, Riva J, Zadeh K, Zadeh S. TEMPO® TVC for the Enumeration of Aerobic Mesophilic Flora in Foods: Collaborative Study. J AOAC Int 2019. [DOI: 10.1093/jaoac/92.1.165] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
The automated system for enumeration of total viable count (TVC) in foods, TEMPO® TVC, uses a dehydrated culture medium and an enumeration card containing 48 wells across 3 different dilutions for the automatic determination of the most probable number (MPN). The alternative method was compared in a multilaboratory collaborative study to AOAC Method 966.23 for determination of aerobic plate count for nondairy products and the Standard Methods for the Examination of Dairy Products (SMEDP) Standard Plate Count for dairy products. Five food types, raw ground beef, raw ground chicken, cooked whitefish fillets, bagged lettuce, and milk, were analyzed for TVC by 14 collaborating laboratories throughout the United States and Canada. Three lots of naturally contaminated food products representing a wide range of counts were tested for each of the 5 food types. The study demonstrated that the overall repeatability, reproducibility, and mean log counts of the TEMPO TVC method were statistically comparable to those of the 2 standard methods at the 5 level.
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Affiliation(s)
- Erin S Crowley
- Q Laboratories, Inc., 1400 Harrison Ave, Cincinnati, OH 45214
| | - Patrick M Bird
- Q Laboratories, Inc., 1400 Harrison Ave, Cincinnati, OH 45214
| | | | - James R Agin
- Q Laboratories, Inc., 1400 Harrison Ave, Cincinnati, OH 45214
| | - David G Goins
- Q Laboratories, Inc., 1400 Harrison Ave, Cincinnati, OH 45214
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Silbernagel K, Jechorek R, Carver C, Barbour WM, Mrozinski P, Albert A, Andaloro B, Anderson G, Beacorn F, Brooks R, Carson M, Crossfield D, Eliasberg S, Farmer D, Frantzeskakis C, Gasses T, Gatesy T, Hall G, Hanson P, Heddaeus K, Hermann K, Hutchins J, Jenkins J, Johnson F, Johnson J, Kawalek M, Kelly L, Koschmann C, Lannon P, Lester D, Manner K, Martin J, Maselli M, McGovern B, Mohnke F, Moon B, Murray L, Pace R, Richards J, Robeson S, Rodgers D, Rosario G, Saunders C, Shaw C, Dana Shell J, Sloan E, Thompson S, Vialpando M, Voermans R, Watts K, Wieczorek K, Wilson K, Yeh H, Zamora D. Evaluation of the BAX® System for Detection of Salmonella in Selected Foods: Collaborative Study. J AOAC Int 2019. [DOI: 10.1093/jaoac/86.6.1149] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
A multilaboratory study was conducted to compare the automated BAX® System to the standard cultural methods for detection of Salmonella in selected foods. Five food types—frankfurters, raw ground beef, mozzarella cheese, raw frozen tilapia fish, and orange juice—at 3 inoculation levels, were analyzed by each method. A sixth food type, raw ground chicken, was tested using 3 naturally contaminated lots. A total of 16 laboratories representing government and industry participated. In this study, 1386 samples were analyzed, of which 1188 were paired samples and 198 were unpaired samples. Of the 1188 paired samples, 461 were positive by both methods and 404 were negative by both methods. Thirty-seven samples were positive by the BAX System but negative by the standard reference method, and 11 samples were positive by standard cultural method and negative by the BAX System. Of the 198 unpaired samples, 106 were positive by the BAX System and 60 were positive by the standard cultural method. A Chi square analysis of each of the 6 food types, at the 3 inoculation levels tested, was performed. For all foods, the BAX System demonstrated results comparable to those of the standard reference methods based on the Chi square results.
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Affiliation(s)
| | | | - Charles Carver
- rtech laboratories, PO Box 64101, St. Paul, MN 55164-0101
| | - W Mark Barbour
- DuPont Qualicon, 3531 Silverside Rd, Bedford Building, Wilmington, DE 19810
| | - Peter Mrozinski
- DuPont Qualicon, 3531 Silverside Rd, Bedford Building, Wilmington, DE 19810
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