NCIt definition : A white, crystalline powder that is very unstable in the presence of light but fairly
heat resistant. Ochratoxin A is a widespread, naturally occurring mycotoxin that is
produced by some fungi, especially by Aspergillus and Penicillium, and is a very common
food contaminant found on grains, coffee beans, nuts, decaying vegetation, moldy cereals
and animal feeds. This toxin is used in research as an experimental teratogen and
carcinogen. Ochratoxin A is reasonably anticipated to be a human carcinogen and may
be associated with an increased risk of developing urinary tract tumors. (NCI05);