Citrinin mycotoxin is a polyketide produced by several species of the genera Aspergillus, Penicillium and Monascus. Though A. niger is reported to be the highest producer of citrinin among the Aspergillus species, other citrinin producers of this genus include A. awentil, A. ostianus, A. fumigatus, A. niveus, A.awamori and A. parasiticus [1]. Some of the citrinin producing fungi are also able t...

Previous studies have shown that ver-1A encodes an enzyme which is directly involved in the conversion of versicolorin A to demethylsterigmatocystin during aflatoxin B1 (AFB1) biosynthesis in the filamentous fungus Aspergillus parasiticus. In this study, two different tools were utilized to study the regulation of ver-1A expression at the level of transcription and protein accumulation. First, ...

A method was developed for simultaneous quantitation of Aspergillus flavus/A. parasiticus and aflatoxins in peanuts. Peanut samples were ground with an equal weight of water in a vertical cutter mixer to produce a slurry. Separate subsamples were taken for dilution-plating to determine total colony forming units (CFU)/g of A. flavus/A. parasiticus and for liquid chromatographic analysis to dete...

One strategy to reduce aflatoxin contamination of maize and cottonseed is to introduce spores of non-aflatoxigenic strains as competitors. Using isogenic mutants we show that, upon 5 or 20 min exposure to 302 nm (UVB) light, the viability of conidia of Aspergillus flavus and Aspergillus parasiticus mutants lacking the ability to accumulate any aflatoxin precursor metabolite is reduced five-fold...

Aflatoxins (AF) are mycotoxins derived by Aspergillus flavus and Aspergillus parasiticus and are listed as Group I carcinogens by the International Agency for Research on Cancer (IARC), a body of the World Health Organization. The main aflatoxins are the B1 (AFB1), B2, G1 and G2 together with their metabolites, among which the most important is the aflatoxin B1. AFB1 is the molecule with the hi...

Aflatoxins are secondary metabolites produced by some competent mould strains of Aspergillus flavus, A. parasiticus and A. nomius. These compounds have been extensively studied with regards to their toxicity for animals and humans; they are able to induce liver cancer and may cause a wide range of adverse effects in living organisms. Aflatoxins are found as natural contaminants of food and feed...

background : aflatoxins (afs) are secondary hazardous fungal metabolites that are produced by strains of some aspergillus species on food and feedstuffs. aflatoxin b 1 (afb 1 ) is one of the most important af with high toxicity. prevention of af production and their elimination from food products is a matter of importance for many researchers in the last decades. nanomaterials applications in m...