Parasites, major foodborne illnesses caused by parasites.

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Presentation transcript:

Parasites, major foodborne illnesses caused by parasites

Parasites CANNOT grow in food MUST need a host to grow, such as cows

Microworld Key Terms – Microorganism – Pathogens – Toxins – FAT TOM (Food Acidity, Temperature, Time, Oxygen, Moisture) – Viruses – Bacteria, spore – Parasites – Fungi – Mold – Yeast

Conditions for growth

Moulds Very small simple plants that appear on foods with a ‘whisker like’ appearance Not all are bad – cheese, penicillin Grow quickly Produce toxins that cause illness Most moulds affect the quality of the food

Yeasts Single cell plants or organisms Not all are bad – beer, wine and bread

pH Level

The level of acidity in food 1 = very acidic 14 = very alkaline 7 = neutral, neither acid nor alkaline Most micro-organisms grow best at near neutral pH. Bacteria is less tolerant than moulds or yeasts