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Use of Antimicrobial Food Additives as Potential Dipping Solutions to Control Pseudomonas spp. Contamination in the Frankfurters and Ham

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This study evaluated the effect of sodium diacetate and sodium lactate solutions for reducing the cell count of Pseudomo-nas spp. in frankfurters and hams. A mixture of Pseudomonas aeruginosa (NCCP10338, NCCP10250, and NCCP11229),and Pseudomonas fluorescens (KACC10323 and KACC10326) was inoculated on cooked frankfurters and ham. The inoc-ulated samples were immersed into control (sterile distilled water), sodium diacetate (5 and 10%), sodium lactate (5 and10%), 5% sodium diacetate + 5% sodium lactate, and 10% sodium diacetate + 10% sodium lactate for 0-10 min. Inoculatedfrankfurters and ham were also immersed into acidified (pH 3.0) solutions such as acidified sodium diacetate (5 and 10%),and acidified sodium lactate (5 and 10%) in addition to control (acidified distilled water) for 0-10 min. Total aerobic platecounts for Pseudomonas spp. were enumerated on Cetrimide agar. Significant reductions (ca. 2 Log CFU/g) in Pseudomo-nas spp. cells on frankfurters and ham were observed only for a combination treatment of 10% sodium lactate + 10% sodiumdiacetate. When the solutions were acidified to pH 3.0, the total reductions of Pseudomonas spp. were 1.5-4.0 Log CFU/g. The order of reduction amounts of Pseudomonas spp. cell counts was 10% sodium lactate > 5% sodium lactate ≥ 10%sodium diacetate > 5% sodium diacetate > control for frankfurters, and 10% sodium lactate > 5% sodium lactate > 10%sodium diacetate > 5% sodium diacetate > control for ham. The results suggest that using acidified food additive antimicro-bials, as dipping solutions, should be useful in reducing Pseudomonas spp. on frankfurters and ham.

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