Five strains ofAspergillusfJavus lacking the ability to produce aflatoxins were examined in greenhouse tests for the ability to prevent a toxigenic strain from contaminating developing cottonseed with aflatoxins. All atoxigenic strains reduced contamination when inoculated into developing bolls 24 h prior to the toxigenic strain. However, only one strain, AF36, was highly effective when inocula...

PURPOSE To document transcriptional activation (expression) of key aflatoxin biosynthetic pathway genes in corneal isolates of Aspergillus flavus. METHODS The expression of certain regulatory (aflatoxin regulatory [aflR] and aflatoxin J [aflJ]) and structural (polyketide synthase acetate [pksA] and norsolonic acid-1 [nor-1]) genes in four corneal A. flavus isolates was evaluated by reverse tr...

The objective of this study was to evaluate biotic interaction between some mould species and active producer of aflatoxin B1 Aspergillus flavus NRRL 3251, co-cultured in yeast-extract sucrose (YES) broth. Twenty-five mould strains of Alternaria spp., Cladosporium spp., Mucor spp., A. flavus and A. niger, used as biocompetitive agents, were isolated from outdoor and indoor airborne fungi, scrap...

Maize has been adopted as a primary staple human food in Africa. In parts of West Africa, it is consumed up to three times a day and is used as weaning food for babies (1,21). Maize is vulnerable to degradation by mycotoxic fungi, but in the developing world and in sub-Saharan Africa in particular, official monitoring of mycotoxin contamination levels is rare. In West Africa, 98% of people test...

background: aflatoxins are the most common mycotoxins that contaminate crops. they are produced by fungi such as aspergillus flavus and aspergillus parasiticus . wheat ( tricitumaestivum ) is one of the most important staple foods used in iran, and the environmental conditions in the north of iran are favorable to fungal growth. this study was designed in order to determine the aflatoxin concen...