Evaluating the efficacy of three U.S. Department of Agriculture-approved antimicrobial sprays for reducing Shiga toxin-producing Escherichia coli surrogate populations on bob veal carcasses

N. J. Sevart, N. Baumann, H. Thippareddi, T. A. Houser, J. B. Luchansky, A. C.S. Porto-Fett, D. B. Marx, G. R. Acuff, R. K. Phebus

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Effective antimicrobial intervention strategies to reduce Shiga toxin-producing Escherichia coli (STEC) risks associated with veal are needed. This study evaluated the efficacy of lactic acid (4.5%, pH 2.0), Citrilow (pH 1.2), and Beefxide (2.25%, pH 2.3) for reducing STEC surrogates on prerigor and chilled bob veal carcasses and monitored the effects of these interventions on chilled carcass color. Dehided bob veal carcasses were inoculated with a five-strain cocktail of rifampin-r esistant, surrogate E.coli bacteria. E. Coli surrogates were enumerated after inoculation, after water wash, after prechill carcass an timicrobial sprayapplication, after chilling for 24 h, and after postchill carcass antimicrobial spray application; carcass color was measured throughout the process. A standard carcass water wash (∼50°C) reduced the STEC surrogate population by 0.9 log CFU/cm2 (P < 0.05). All three antimicrobial sprays applied to prerigor carcasses delivered an additional ∼0.5-log reduction (P > 0.05) of the surrogates. Chilling of carcasses for 24 h reduced (P > 0.05) the surrogate population by an additional ∼0.4 log cycles. The postchill application of the antimicrobial sprays provided no further reductions. Carcass L∗, a∗, and b∗color values were not different (P < 0.05) among carcass treatments. Generally, the types and concentrations of the antimicrobial sprays evaluated herein did not negatively impact visual or instrumental color of chilled veal carcasses. This study demonstrates that warm water washing, followed by a prechill spray treatment with a low-pH chemical intervention, can effectively reduce STEC risks associated with veal carcasses; this provides processors a validated control point in slaughter operations.

Original languageEnglish (US)
Pages (from-to)956-962
Number of pages7
JournalJournal of food protection
Volume79
Issue number6
DOIs
StatePublished - Jun 2016

Fingerprint

Shiga-Toxigenic Escherichia coli
veal
United States Department of Agriculture
Shiga toxin-producing Escherichia coli
USDA
anti-infective agents
Color
Population
Water
color
Escherichia coli
Rifampin
rifampicin
water
Lactic Acid
lactic acid
washing
Bacteria
slaughter
bacteria

Keywords

  • Antimicrobial interventions
  • Carcass wash
  • Color
  • Shiga toxin-producing Escherichia coli
  • Veal

ASJC Scopus subject areas

  • Food Science
  • Microbiology

Cite this

Evaluating the efficacy of three U.S. Department of Agriculture-approved antimicrobial sprays for reducing Shiga toxin-producing Escherichia coli surrogate populations on bob veal carcasses. / Sevart, N. J.; Baumann, N.; Thippareddi, H.; Houser, T. A.; Luchansky, J. B.; Porto-Fett, A. C.S.; Marx, D. B.; Acuff, G. R.; Phebus, R. K.

In: Journal of food protection, Vol. 79, No. 6, 06.2016, p. 956-962.

Research output: Contribution to journalArticle

Sevart, N. J. ; Baumann, N. ; Thippareddi, H. ; Houser, T. A. ; Luchansky, J. B. ; Porto-Fett, A. C.S. ; Marx, D. B. ; Acuff, G. R. ; Phebus, R. K. / Evaluating the efficacy of three U.S. Department of Agriculture-approved antimicrobial sprays for reducing Shiga toxin-producing Escherichia coli surrogate populations on bob veal carcasses. In: Journal of food protection. 2016 ; Vol. 79, No. 6. pp. 956-962.
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