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Inhibition of Botulinum Toxin Formation in Bacon by Acid Development.

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Area of Science:

  • Food Microbiology
  • Food Safety
  • Bacteriology

Background:

  • Sodium nitrite is crucial for preventing *Clostridium botulinum* growth in cured meats like bacon.
  • Reducing sodium nitrite levels is desirable to minimize nitrosamine formation, a potential health concern.
  • Alternative methods to maintain the antimicrobial efficacy of bacon are needed.

Purpose of the Study:

  • To evaluate *Lactobacillus plantarum* and sucrose as replacements for sodium nitrite in bacon.
  • To assess the antibotulinal properties of this alternative system.
  • To determine if sodium nitrite can be reduced or eliminated without compromising safety.

Main Methods:

  • Bacon slices were inoculated with *Clostridium botulinum* spores and *Lactobacillus plantarum* culture.
  • Samples were vacuum-packaged and incubated at 27°C.
  • Assays for botulinal toxin were performed after various incubation periods.

Main Results:

  • Sodium nitrite alone (120 ppm) was ineffective without a fermentable carbohydrate source like sucrose.
  • The efficacy of sodium nitrite plus sugar was variable without added lactic acid bacteria.
  • *Lactobacillus plantarum* with sucrose provided significant protection against botulinal toxin development.

Conclusions:

  • The combination of lactic acid bacteria and sucrose offers robust protection against *Clostridium botulinum* in bacon.
  • This system inhibits *C. botulinum* growth through acid production, even under temperature abuse.
  • Nitrite levels can be reduced in bacon production without compromising safety, potentially lowering nitrosamine formation.