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Arkansas Animal Science Department Report 2001 combinations throughout display and were 2.00, 2.61 and 1.13 log CFU/g less (P < 0.05) than C for AC, CC and CT treatments, respectively by day 7 of display (Fig. 1, panel A). Likewise, total coliforms were also reduced (P < 0.05) by all antimicrobial treatment combinations throughout display, and were 2.65, 2.55 and 0.93 log CFU/g less (P < 0.05) for AC, CC and CT treatments, respectively by day 7 of display compared with C (Fig. 1, panel B). Implications Results from this study show that the use of multiple antimicrobial interventions during ground beef production can reduce microorganisms and extend shelf life. Additionally, this technology could increase meat yields and profit as an intervention to improve meat safety under the new retained water rule of the USDA. Literature Cited Dickson , J.S. and M.E., Anderson. 1992. Journal of Food Protection. 55(2):133-140. Ellebracht, E.A., et al. 1999. J. Food Science. 64(6):1094. Fratamico, P.M., et al. 1996. J. Food Protection. 59(5):453. Gorman, B. M., et al. 1995. J. Food Protection. 58(8):899. Graves-Delmore, L.R., et al. 1998. J. Food Science. 63(5):890. Hardin, M.D., et al. 1995. J. Food Protection. 58(4):368. Kochevar, S.L., et al. 1997. Meat Science. 45(3):377. Phebus, R.K., et al. 1997. J. Food Protection. 60(5):476. Siragusa, G.R. 1995. J. Food Safety. 15:229. Acknowledgments Appreciation is expressed to the Arkansas Beef Council for funding this research. The authors would like to thank J. Davis, L. Rakes, A. Ivey, L. McBeth, R. Story and E. Kroger for their assistance in conducting these trials. Table 1. Least-squares means (±SE) for the effect of multiple antimicrobial treatments a applied to beef trimmings before grinding on log CFU/g Salmonella typhimurium and aerobic plate count (APC) of ground beef through simulated retail display. Treatment C AC CC CT SE Microorganism Salmonella 5.81z b 3.83x 4.43y 4.64y .12 typhimurium APC 7.06z 5.30x 5.89y 6.18y .11 a C = Control; AC = 5% acetic acid and 0.5% cetylpyridinium chloride; CC = 200 ppm chlorine dioxide and 0.5% cetylpyridinium chloride; CT = 0.5% cetylpyridinium chloride and 10% trisodium phosphate. b Least-squares means within a row without a common letter differ (P < 0.05). Table 2. Least-squares means (±SE) for the effect of duration of display on log CFU/g Salmonella typhimurium and aerobic plate count (APC) of ground beef. Day of display 0 1 2 3 7 Microorganism Salmonella 5.18 ± .13y a 5.24 ± .13z 4.53 ± .13y 4.45 ± .13y 3.97 ± .13x typhimurium APC 5.96 ± .13 6.25 ± .13 6.11 ± .12 6.05 ± .12 6.14 ± .12 a Least-squares means within a row without a common letter differ (P < 0.05). 170
AAES Research Series 488 Figure 1. Least-squares means (±SE) for the day of display by antimicrobial treatment interaction effect on log CFU/g (A) E. coli and (B) coliform counts in ground beef through simulated display. abc Least-squares means within a day having no common superscripts differ (P < 0.05). d C = control, e AC = 5% acetic acid and 0.5% cetylpyridinium chloride, f CC = 200 ppm chlorine dioxide and 0.5% cetylpyridinium chloride, g CT = 0.5% cetylpyridinium chloride and 10% trisodium phosphate. 171
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Arkansas Animal Science Department
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spine copy ARKANSAS ANIMAL SCIENCE
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INTRODUCTION The faculty and staff
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COMMON ABBREVIATIONS Abbreviation T
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The Effects of Nitrogen Fertilizati
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Efficacy of Mannan Oligosaccharide
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Effect of Feather Meal on Live Anim
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Supplementation of Beef Cows and He
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Influence of Supplementing Cobalt i
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Small Grain Forage for Stocker Catt
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Economics of Production Systems Inv
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