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Do Temperature Abuses Along the Frozen Açaí Pulp Value Chain Increase Microbial Hazards?

Jéssica Caroline Araujo Silva Sandes1,2, Eduardo Henrique Miranda Walter2, Gustavo Luis de Paiva Anciens Ramos3

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Temperature abuse of unpasteurized frozen açaí pulp did not increase microbial hazards. Studies show abusive thawing conditions did not elevate pathogen risks in açaí products.

Keywords:
Escherichia coliEuterpe oleraceaListeria monocytogenesSalmonellafood safetypredictive modeling

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Area of Science:

  • Food Science
  • Microbiology
  • Food Safety

Background:

  • Unpasteurized frozen açaí pulp is susceptible to microbial contamination.
  • Temperature abuse during the supply chain can impact food safety.
  • Understanding microbial behavior under stress is crucial for risk assessment.

Purpose of the Study:

  • To investigate the impact of temperature abuse on microbial hazards in frozen açaí pulp.
  • To assess the behavior of pathogenic and spoilage microorganisms during simulated thawing and refreezing cycles.
  • To determine if abusive storage conditions increase microbial risks in açaí products.

Main Methods:

  • Two simulated thawing conditions were used: refrigeration (5°C) and room temperature.
  • Repeated cold chain abuse was simulated by thawing and refreezing açaí pulp four times over 90 days.
  • Microbial populations (Escherichia coli, Listeria monocytogenes, Salmonella spp., mesophilic bacteria, yeasts, and molds) were monitored using the Weibull model.

Main Results:

  • Freezing inhibited most microorganisms, with mesophilic aerobic bacteria showing some survival.
  • Under abusive thawing, inactivation times varied, with Escherichia coli showing the shortest inactivation.
  • Listeria monocytogenes and Salmonella spp. concentrations were lower in samples exposed to abusive conditions compared to controls after 90 days.

Conclusions:

  • The simulated abusive thawing conditions did not increase the potential microbial hazards of pathogens in unpasteurized frozen açaí pulp.
  • Cold chain management is important, but the studied abuse scenarios did not exacerbate pathogen risks.
  • Further research may explore optimal thawing protocols to ensure açaí pulp safety.