ochratoxin a/картоф

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Ochratoxin A biosynthetic genes in Aspergillus ochraceus are differentially regulated by pH and nutritional stimuli.

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Expression of the polyketide synthase (pks) gene which is involved in ochratoxin A (OTA) biosynthesis in Aspergillus ochraceus is linked to production of the mycotoxin, with high levels of pks mRNA accumulation occurring in cultures producing OTA, as assessed by real-time reverse transcription

Determination of Patulin and Ochratoxin A using HPLC in apple juice samples in Saudi Arabia.

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Although, Patulin and Ochratoxin are produced by the same genera of molds, however, Patulin was the most extensively studied mycotoxins in apple juice and no reports have explored the presence of Ochratoxin A in the apple juice. Therefore, the objective of this study was to explore the presence of

Initial Spore Density Has an Influence on Ochratoxin A Content in Aspergillus ochraceus CGMCC 3.4412 in PDB and Its Interaction with Seeds.

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The morphology and secondary metabolism of Aspergillus spp. are associated with initial spore density (ISD). Fatty acids (FA) are involved in the biosynthesis of aflatoxins (AF) through Aspergillus quorum sensing (QS). Here, we studied how ochratoxin A (OTA) was regulated by spore density in

Transformation of the mycotoxin ochratoxin A in plants. 2. Time course and rates of degradation and metabolite production in cell-suspension cultures of different crop plants.

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Ochratoxin A, one of the most toxic mycotoxins, can be metabolized nearly completely by suspension cultures of various plant cells. The transformation products identified in this study were almost the same in the cell-suspension cultures of maize, carrot, tomato, potato, soybean, wheat and barley,

An investigation of fungal contamination on the surface of medicinal herbs in China.

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BACKGROUND The dried parts of medicinal herbs are susceptible to the infection of fungi during pre- or post-harvest procedure. This study aimed to investigate the presence of fungi and their metabolites mycotoxins on the surface of medicinal herbs collected from China. METHODS Forty-five retail

Postharvest and stored corn in Brazil: mycoflora interaction, abiotic factors and mycotoxin occurrence.

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The mycoflora of 130 samples of postharvest and stored corn was analysed throughout one year. The sample originated from Riberirão Preto, State of São Paulo, Brazil. The influences of abiotic factors (moisture content, relative humidity, temperature, rainfall) and mycotoxin occurrence were also

Mycobiota of ground red pepper and their aflatoxigenic potential.

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To investigate contamination of ground red pepper with fungi and mycotoxin, we obtained 30 ground red pepper samples from 15 manufacturers in the main chili-pepper-producing areas in Korea. Fungal contamination was evaluated by spreading diluted samples on potato dextrose agar plates. The total

Mycotoxin producing potential of some isolates of Aspergillus flavus and Eurotium groups from meat products.

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All strains (92) of A. flavus group proved to be positive for production of aflatoxin (45 to 1200 micrograms/50 ml medium) on potato dextrose liquid medium, while 59 strains only proved to be positive (35-310 micrograms/50 ml) on 15% NaCl potato-dextrose liquid medium. Most of the strains tested of

Mycotoxins in Feeds and Ingredients and their Origin.

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Data from many parts of the world on incidence and levels of aflatoxins in feeds and feed ingredients indicate cause for concern, especially in tropical and sub-tropical regions and in those countries importing feedstuffs from these areas. The main products affected are peanut (groundnut) meal,

Isolation and partial characterization of antifungal metabolites of Bacillus pumilus.

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Antifungal metabolites produced by Bacillus pumilus in Potato Dextrose Broth (PDB) were isolated from culture supernatant fluid by precipitation with ammonium sulphate. The antifungal metabolites inhibited mycelial growth of many species of Aspergillus, Penicillium and Fusarium. They also inhibited

Candida utilis ATCC 9950 Cell Walls and β(1,3)/(1,6)-Glucan Preparations Produced Using Agro-Waste as a Mycotoxins Trap.

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Mycotoxins are harmful contaminants of food and feed worldwide. Feed additives with the abilities to trap mycotoxins are considered substances which regulate toxin transfer from feed to tissue, reducing its absorption in animal digestive tract. Market analysis emphasizes growing interest of feed

Review of the inhibition of biological activities of food-related selected toxins by natural compounds.

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There is a need to develop food-compatible conditions to alter the structures of fungal, bacterial, and plant toxins, thus transforming toxins to nontoxic molecules. The term 'chemical genetics' has been used to describe this approach. This overview attempts to survey and consolidate the widely

Penicillium expansum: consistent production of patulin, chaetoglobosins, and other secondary metabolites in culture and their natural occurrence in fruit products.

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Penicillium expansum is known for its destructive rot and patulin production in apple juice. According to the literature, P. expansum can, among other compounds, produce citrinin, ochratoxin A, patulin, penitrem A, and rubratoxin B. In this study the qualitative production of metabolites was

Ochratoxin production by the Aspergillus ochraceus group and Aspergillus alliaceus.

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Ochratoxin A is a toxic and carcinogenic fungal secondary metabolite; its presence in foods is increasingly regulated. Various fungi are known to produce ochratoxins, but it is not known which species produce ochratoxins consistently and which species cause ochratoxin contamination of various crops.

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