نتایج جستجو برای: aflatoxigenic

تعداد نتایج: 282  

2017
Menza C. Nelson Lucy Kamau

Aflatoxin contaminates foods including peanuts. Aflatoxin is a carcinogenic toxin mainly produced bty Aspergillus flavus. Other Aspergillus species that rarely produce aflatoxins are A. nomius and A. niger. Aflatoxin is associated with liver failure, hepatocellular carcinoma (HCC) and death. Recent studies have shown that peanuts in Kenya are highly contaminated with aflatoxins but information ...

2014
Feng Zhang Zhenni Guo Hong Zhong Sen Wang Weiqiang Yang Yongfeng Liu Shihua Wang

Aspergillus flavus is one of the most important producers of carcinogenic aflatoxins in crops, and the effect of water activity (a(w)) on growth and aflatoxin production of A. flavus has been previously studied. Here we found the strains under 0.93 a(w) exhibited decreased conidiation and aflatoxin biosynthesis compared to that under 0.99 a(w). When RNA-Seq was used to delineate gene expression...

2013
Otniel Freitas-Silva Héctor Morales-Valle Armando Venâncio

This study aimed to verify the use of aqueous ozone as alternative technology for fungal control. Brazil nuts sterilized were inoculated with either 1 × 10(6) or 1 × 10(7) conidia mL(-1) of Aspergillus flavus (MUM 9201) to determine optimal treatment parameters and different aqueous ozone contact times. These assays showed that the effect of ozone is almost immediate against A. flavus, and the ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2009
Anindya Chanda Ludmila V Roze Suil Kang Katherine A Artymovich Glenn R Hicks Natasha V Raikhel Ana M Calvo John E Linz

Eukaryotes have evolved highly conserved vesicle transport machinery to deliver proteins to the vacuole. In this study we show that the filamentous fungus Aspergillus parasiticus employs this delivery system to perform new cellular functions, the synthesis, compartmentalization, and export of aflatoxin; this secondary metabolite is one of the most potent naturally occurring carcinogens known. H...

2015
Larisa Shcherbakova Natalia Statsyuk Oleg Mikityuk Tatyana Nazarova Vitaly Dzhavakhiya

BACKGROUND Aflatoxin B1 (AFB1), produced by Aspergillus flavus, is one of the most life threatening food contaminants causing significant economic losses worldwide. Biological AFB1 degradation by microorganisms, or preferably microbial enzymes, is considered as one of the most promising approaches. OBJECTIVES The current work aimed to study the AFB1-degrading metabolites, produced by Phoma gl...

2016
Tomohiro Furukawa Kurin Iimura Taichi Kimura Toshiyoshi Yamamoto Shohei Sakuda

Inhibitors of aflatoxin production of aflatoxigenic fungi are useful for preventing aflatoxin contamination in crops. As methyl syringate weakly inhibits aflatoxin production, aflatoxin production inhibitory activities of additional alkyl syringates with alkyl chains from ethyl to octyl were examined. Inhibitory activity toward aflatoxin production of Aspergillus flavus became stronger as the l...

Journal: :Applied and environmental microbiology 1997
R Shapira N Paster M Menasherov O Eyal A Mett T Meiron E Kuttin R Salomon

Polyclonal antibodies (PAb) were raised against an aflatoxigenic strain of Aspergillus parasiticus by using two different sources for antibody elicitation: (i) filtrate of a culture on which the fungus had been grown (ii) and two chimeric proteins, expressed in Escherichia coli as separate products, of the genes ver-1 and apa-2, which are involved in aflatoxin biosynthesis. The gene products we...

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