Producers and important dietary sources of ochratoxin A and citrinin.

Toxins (2013-09-21)
Vladimir Ostry, Frantisek Malir, Jiri Ruprich
ABSTRACT

Ochratoxin A (OTA) is a very important mycotoxin, and its research is focused right now on the new findings of OTA, like being a complete carcinogen, information about OTA producers and new exposure sources of OTA. Citrinin (CIT) is another important mycotoxin, too, and its research turns towards nephrotoxicity. Both additive and synergistic effects have been described in combination with OTA. OTA is produced in foodstuffs by Aspergillus Section Circumdati (Aspergillus ochraceus, A. westerdijkiae, A. steynii) and Aspergillus Section Nigri (Aspergillus carbonarius, A. foetidus, A. lacticoffeatus, A. niger, A. sclerotioniger, A. tubingensis), mostly in subtropical and tropical areas. OTA is produced in foodstuffs by Penicillium verrucosum and P. nordicum, notably in temperate and colder zones. CIT is produced in foodstuffs by Monascus species (Monascus purpureus, M. ruber) and Penicillium species (Penicillium citrinum, P. expansum, P. radicicola, P. verrucosum). OTA was frequently found in foodstuffs of both plant origin (e.g., cereal products, coffee, vegetable, liquorice, raisins, wine) and animal origin (e.g., pork/poultry). CIT was also found in foodstuffs of vegetable origin (e.g., cereals, pomaceous fruits, black olive, roasted nuts, spices), food supplements based on rice fermented with red microfungi Monascus purpureus and in foodstuffs of animal origin (e.g., cheese).

MATERIALS
Product Number
Brand
Product Description

Supelco
Ochratoxin A solution, 10 μg/mL in acetonitrile, analytical standard
Sigma-Aldrich
Ochratoxin A, from Petromyces albertensis, ≥98% (HPLC)
Supelco
Ochratoxin A, from Aspergillus ochraceus, reference material
Sigma-Aldrich
Citrinin, from Penicillium citrinum, ≥98% (HPLC)
Supelco
Citrinin solution, ~100 μg/mL in acetonitrile, analytical standard