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Microbial contaminants

Published byMelvin Osborne Modified over 6 years ago

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Presentation on theme: "Microbial contaminants"— Presentation transcript:

1 Microbial contaminants
Risks of bacteria, fungi, viruses Ralf Hartemink Wageningen University the Netherlands

2 The microbial world Viruses non-living, non-cellular organisms that require a host to grow Bacteria living, single-celled organisms Algae Parasites Fungi single or multi-celled organisms such as moulds, yeasts and mushrooms Protozoa

3 Microbes and food (bacteria, viruses, fungi) (bacteria, yeasts, fungi)
Good Food fermentation Bad - Pathogens (bacteria, viruses, fungi) (bacteria, yeasts, fungi) Ugly - Spoilage (bacteria, fungi)

4 What you eat can make you sick
“Everybody will get a foodborne illness twice per year”

5 Food poisoning or foodborne illness
Foodborne intoxications Symptoms, after 0-4h nausea vomiting Duration 1 day Bacterial toxin Bacterium does not have to be in the product anymore ! Foodborne infections Symptoms, after 8-24h abdominal pain diarrhoea Duration 1-3 days Bacteria, virus Young Old Immuno-compromised Pregnant

6 Fungal toxins : Mycotoxins
Hardly ever acute toxic carcinogenic kidney problems ... Potential serious health risks Most well known: Aflatoxin Zearalenon Ochratoxin Many not known ! Spread easily in food chain

7 Fungal toxins : Aflatoxin

8 Prevention : look at the chain
Production Preparation Consumption Increasing/Decreasing risks Product characteristics Bacterial characteristics Risk Assessment of worst case scenario Legislation

9 New challenges and risks : the consumer
Production Preparation Consumption Increasing/Decreasing risks Consumer demands New trends Natural / Organic Less processed Sustainable /packaging Less salt / sugar No additives ... Different and/or (mostly) higher risks Potentially more cases Research and legislation

10 New challenges and risks : globalisation
Food safety standards, legislation : not harmonised Bacterial prevalence differs widely between regions

11 New challenges : the organism
‘new’ bacteria Listeria : unknown until 1980s Changed ‘old’ bacteria EHEC, STEC, EIEC... Emerging pathogens ‘new’ and more viruses astrovirus nipah virus Adapted bacteria bacteria in unexpected places

12 Thank you for your attention
US Campaign

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