Ochratoxin A (OTA) is nephrotoxic, hepatotoxic, immunotoxic, neurotoxic, reprotoxic, teratogenic, and carcinogenic (group 2B), being characterized by species and sex differences in sensitivity. Despite the fact that OTA is in some aspects a controversial topic, OTA is the most powerful renal carcinogen. The aim of this study was to make a small survey concerning OTA content in black tea, fruit tea, and ground roasted coffee, and to assess OTA transfer into beverages. OTA content was measured using a validated and accredited HPLC-FLD method with a limit of quantification (LOQ) of 0.35 ng/g. The OTA amount ranged from LOQ up to 250 ng/g in black tea and up to 104 ng/g in fruit tea. Black tea and fruit tea, naturally contaminated, were used to prepare tea infusions. The transfer from black tea to the infusion was 34.8% ± 1.3% and from fruit tea 4.1% ± 0.2%. Ground roasted coffee naturally contaminated at 0.92 ng/g was used to prepare seven kinds of coffee beverages. Depending on the type of process used, OTA transfer into coffee ranged from 22.3% to 66.1%. OTA intakes from fruit and black tea or coffee represent a non-negligible human source.

• MeSH
• čaj mikrobiologie   MeSH
• káva mikrobiologie   MeSH
• koncentrace vodíkových iontů MeSH
• kontaminace potravin analýza   MeSH
• ochratoxiny analýza   MeSH
• ovoce mikrobiologie   MeSH
• potravinářská mikrobiologie MeSH
• vysokoúčinná kapalinová chromatografie MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Názvy látek
• čaj MeSH
• káva MeSH
• ochratoxin A MeSH Prohlížeč
• ochratoxiny MeSH

A study of experimental contamination of foods with spores of toxigenic micromycetes (Aspergillus flavus andPenicillium verrucosum) was realized. Samples of bread, apricot jam, Edam cheese, processed cheese and half-fat dried milk purchased on the market were used for experimental contamination. Aflatoxins and ochratoxin A were determinated in experimental contaminated foodstuffs.

• Publikační typ
• časopisecké články MeSH