Activity 2:
  Mould and mycotoxins: basic knowledge check

Question Key
1. Why are some food moulds dangerous? They can produce poisonous substances called mycotoxins.
2. What conditions do they thrive in? They need food (their nutrient requirements) and moisture.
3. Do they have chronic effects or acute effects? Both, but the concern is mainly with chronic build-up in the body.
4. Which mycotoxin is associated with coffee? OTA
5. What does its name stand for? Ochratoxin A
6. How dangerous is it? What can it do? Very dangerous - particularly harmful to the kidneys, can cause cancer and birth defects
7. What's the best way to prevent it? Keep moisture content low
8. What does a moisture reading tell you? The average moisture content of a batch
10. If the average moisture content is below the maximum permitted level, can you be sure of having prevented mould growth in the coffee? No, because if the drying was very non-uniform it is possible for individual beans to have enough moisture to support mould growth.
11. Can OTA survive fermentation? Roasting? Yes
12. What is the maximum moisture content for exportable coffee recommended by the ICO? 12.5%
13. When did the EU limits on OTA in roasted and soluble coffee come into effect? January 2005


Mycotoxins in food and feed
Mycotoxins of major economic and public health interest
What organisms are involved in the production of OTA in coffee?
What are the properties of the OTA-producers in laboratory tests?
Mould growth in field conditions
Controlling mould growth through moisture management in the marketing chain
Presentation
 Photos
 Links to websites
 and documents
 Selected bibliography
 Ideas for group
 discussion/exercises