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Related Concept Videos

Sources of Food Contamination01:29

Sources of Food Contamination

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...
Hazard Analysis and Critical Control Points (HACCP)01:30

Hazard Analysis and Critical Control Points (HACCP)

Hazard Analysis and Critical Control Points (HACCP) is a science-based, preventive system used globally to ensure food safety by identifying, evaluating, and controlling biological, chemical, and physical hazards throughout food production. Originally developed by NASA and the Pillsbury Company for astronaut food, HACCP is now a core component of the Codex Alimentarius.HACCP operates on prerequisite programs—such as Good Manufacturing Practices (GMPs), sanitation procedures, and supplier...
Pasteurization and Food Preservation01:28

Pasteurization and Food Preservation

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,...
Methods of Controlling Food Spoilage01:26

Methods of Controlling Food Spoilage

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...
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...
Microbial Spoilage of Food01:23

Microbial Spoilage of Food

Microbial food spoilage refers to the degradation of food quality resulting from the metabolic activity of microorganisms such as bacteria, yeasts, and molds. These microbes proliferate on various food substrates depending on factors such as moisture content, nutrient availability, and storage conditions, leading to undesirable sensory and structural changes.Bacteria are primary agents of spoilage in high-moisture, nutrient-dense foods like meat, milk, and vegetables. Microbial spoilage occurs...

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Related Experiment Video

Updated: Jun 18, 2026

Tracking Microbial Contamination in Retail Environments Using Fluorescent Powder - A Retail Delicatessen Environment Example
05:49

Tracking Microbial Contamination in Retail Environments Using Fluorescent Powder - A Retail Delicatessen Environment Example

Published on: March 5, 2014

Food safety.

Andrea Borchers1, Suzanne S Teuber, Carl L Keen

  • 1University of California at Davis School of Medicine, 95616, USA.

Clinical Reviews in Allergy & Immunology
|November 14, 2009
PubMed
Summary

Food safety is compromised by pathogens, toxins, heavy metals, and persistent chemicals like DDT and dioxins. Emerging concerns include nanomaterials and complex chemical mixtures, necessitating advanced toxicological approaches for risk assessment.

Area of Science:

  • Environmental Toxicology
  • Food Safety Science
  • Risk Assessment

Background:

  • Food safety is continuously challenged by a wide array of contaminants including pathogens, algal toxins, and fungal toxins with acute and chronic health effects.
  • Industrial activities have led to widespread contamination of the food chain with toxic metals (e.g., lead, cadmium, mercury, arsenic) and persistent organic pollutants (e.g., DDT, dioxins).
  • Chemicals from veterinary drugs, pesticides, food processing, packaging (e.g., phthalates, bisphenol A), and novel materials like nanomaterials pose significant risks.

Purpose of the Study:

  • To highlight the multifaceted nature of food contamination and its associated health risks.
  • To underscore the limitations of traditional single-chemical, single-exposure route risk assessment.
  • To introduce and emphasize the growing importance of mixture toxicology for evaluating cumulative exposures.

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Development of an Electrochemical DNA Biosensor to Detect a Foodborne Pathogen

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Last Updated: Jun 18, 2026

Tracking Microbial Contamination in Retail Environments Using Fluorescent Powder - A Retail Delicatessen Environment Example
05:49

Tracking Microbial Contamination in Retail Environments Using Fluorescent Powder - A Retail Delicatessen Environment Example

Published on: March 5, 2014

Detection of Foodborne Bacterial Pathogens from Individual Filth Flies
12:54

Detection of Foodborne Bacterial Pathogens from Individual Filth Flies

Published on: February 13, 2015

Development of an Electrochemical DNA Biosensor to Detect a Foodborne Pathogen
17:16

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Main Methods:

  • Review of existing scientific literature on food contaminants and their toxicological effects.
  • Analysis of regulatory challenges posed by various contaminants, including genetically modified foods and nanomaterials.
  • Discussion of the principles and necessity of mixture toxicology for assessing combined exposures.

Main Results:

  • Identified numerous chemical and biological agents that compromise food safety, affecting various organ systems and developmental processes.
  • Highlighted the persistence of certain contaminants in the environment and their entry into the food chain.
  • Emphasized the ubiquitous nature of chemical exposures from multiple sources (food, water, air, etc.) and the synergistic effects of chemical mixtures.

Conclusions:

  • Current food safety monitoring and risk assessment methods are challenged by the complexity and ubiquity of chemical contaminants.
  • The development and application of mixture toxicology are crucial for a comprehensive understanding of health risks from concurrent chemical exposures.
  • Advancing mixture toxicology is essential for improving food safety and protecting public health from cumulative toxicological threats.