title: Microbial, instrumental color and sensory characteristics of inoculated ground beef produced using potassium lactate, sodium metasilicate or peroxyacetic acid as multiple antimicrobial interventions.
abstract: Effectiveness of multiple antimicrobial interventions on ground beef microbial, instrumental color and sensory attributes through display was evaluated. Beef trimmings were inoculated with Escherichia coli (EC) and Salmonella typhimurium (ST) then treated with either: (1) 3% potassium lactate followed by 4% sodium metasilicate (KN); (2) 4% sodium metasilicate followed by 3% potassium lactate (NK); (3) 200-ppm peroxyacetic acid followed by 3% potassium lactate (PK); (4) 200-ppm peroxyacetic acid followed by 4% sodium metasilicate (PN); or control (CON). Trimmings were ground, packaged and sampled on days 0-7 of display for EC, ST, coliforms, aerobic plate count, instrumental color and sensory characteristics. Only PK reduced (P<0.05) all bacterial types evaluated. The PN treatment remained (P<0.05) redder (a*), contained more (P<0.05) oxymyoglobin and had less (P<0.05) discoloration than CON by days 3-7 of display. All treatments maintained or improved odor attributes.
authors.affiliation: Department of Animal Science, University of Arkansas, Fayetteville, AR 72701, USA.
authors.forename: S A
authors.initials: SA
authors.lastname: Quilo
authors.forename: F W
authors.initials: FW
authors.lastname: Pohlman
authors.forename: P N
authors.initials: PN
authors.lastname: Dias-Morse
authors.forename: A H
authors.initials: AH
authors.lastname: Brown
authors.forename: P G
authors.initials: PG
authors.lastname: Crandall
authors.forename: R P
authors.initials: RP
authors.lastname: Story
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents; D002417:Cattle; D015169:Colony Count, Microbial; D003116:Color; D004926:Escherichia coli; D005516:Food Microbiology; D005519:Food Preservation / Q000379:methods*; D007773:Lactates; D008461:Meat Products / Q000032:analysis* / Q000382:microbiology; D009211:Myoglobin / Q000032:analysis; D009812:Odorants; D010463:Peracetic Acid; D011188:Potassium; D012486:Salmonella typhimurium; D017640:Silicates
chemical_list: D000900:Anti-Bacterial Agents; D007773:Lactates; D009211:Myoglobin; D017640:Silicates; C017595:oxymyoglobin; C025349:sodium metasilicate; D010463:Peracetic Acid; D011188:Potassium