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Related Concept Videos

Principles of Food Preservation01:27

Principles of Food Preservation

Food spoilage results from microbial growth, enzymatic activity, and environmental factors that gradually degrade the sensory, nutritional, and safety qualities of food. Preservation techniques aim to slow or halt these processes to extend shelf life and maintain product quality.A key concept in food microbiology is the microbial growth curve, which includes four phases: lag, exponential (log), stationary, and death. During the lag phase, bacteria adjust to their environment without significant...
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Food spoilage is caused by microbial growth or by chemical and physical changes, all of which affect the taste, texture, and safety of food.Temperature-Based PreservationRefrigeration at 0–4 °C slows microbial growth and enzyme activity, making it ideal for short-term storage. However, certain spoilage organisms—such as psychrotrophs like Listeria monocytogenes—can still proliferate at these temperatures. Freezing below -18 °C further slows biological processes by forming ice crystals, which...
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Contamination of food by microbial agents and natural toxins poses significant risks to public health. These hazards can be introduced at various points across the food supply chain, ranging from environmental sources to processing and storage stages. Understanding these contamination pathways is critical for developing strategies to ensure food safety.Seafood is particularly vulnerable to contamination through both environmental exposure and microbial colonization. Toxins from harmful algal...
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Pasteurization is a widely employed thermal processing technique designed to enhance the safety and shelf life of perishable food and beverages. By subjecting products to specific high temperatures for controlled durations, this method effectively inactivates pathogenic microorganisms and spoilage enzymes without significantly compromising sensory qualities. The technique has been pivotal in food safety management, especially for consumables susceptible to microbial contamination such as milk,...
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Updated: Jun 24, 2026

Assessment of Social Transmission of Food Preferences Behaviors
04:56

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Published on: January 25, 2018

Food safety knowledge retention study.

Nyall Hislop1, Keara Shaw

  • 1Environmental Public Health Services, Capital Health, Capital Heath Center, South Tower, Suite 200, 10030-107 Street, Edmonton, Alberta, Canada T5J 3E4. nkhislop@telus.net

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|April 9, 2009
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Summary

Certified food handlers demonstrate superior food safety knowledge compared to non-certified staff. This highlights the need for mandatory food safety certification and regular recertification in the food service industry to reduce foodborne illnesses.

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Area of Science:

  • Public Health
  • Food Safety
  • Occupational Health

Background:

  • Foodborne illnesses pose a significant public health and economic burden in Canada.
  • Improper food handling practices are a primary cause of many foodborne illnesses.
  • Enhanced food handler knowledge of food safety is crucial for mitigating societal impact.

Purpose of the Study:

  • To assess the current food safety knowledge of food handlers in the Canadian food service industry.
  • To compare the food safety knowledge between certified and non-certified food handlers.
  • To identify specific knowledge gaps and inform future food safety initiatives.

Main Methods:

  • A standardized questionnaire was administered to food handlers during on-site inspections by environmental health officers.
  • Data collected included food safety knowledge, certification status, and years of experience.
  • Responses were analyzed to evaluate immediate knowledge of key food safety issues.

Main Results:

  • Certified food handlers exhibited significantly greater knowledge of food safety compared to non-certified handlers.
  • The highest rates of knowledge failure were found in non-certified food handlers with less than one year and over ten years of experience.
  • Experience alone did not guarantee comprehensive food safety knowledge.

Conclusions:

  • Mandatory food safety certification for all food service workers is recommended.
  • Recertification every 10 years is suggested to maintain adequate knowledge levels.
  • Findings provide insights for improving existing food safety training programs and targeting future initiatives.