Patulin is a mycotoxin produced by particular forms of moulds typically from the genera aspergillus, penicillium and byssochlamys. Patulin is normally found in apples or pears that shows areas of rot but has also been detected in small amounts in other fruits. It can be a significant problem in fruits that are suspectable to “core rot”, e.g. Bramley apples, where the fruit might look quite sound “on the outside” but may actually contain a very high level of contamination with patulin in the centre of the fruit.
Since this recommendation was first published there have been a number of new methods developed to assist in the analysis of patulin, which are discussed in this revised recommendation.