الفهرس 
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Abstract
This investigation was undertaken to survey the aflatoxins contamination of non roasted and roasted peanut in Cairo and evaluate the nutritional value of non contaminated and contaminated with aflatoxins non roasted and roasted peanut.
The obtained result could be summarized as follows:
Aflatoxins are common contaminants of peanut and peanut– based products. Survey for aflatoxins in commercially available peanut was carried out in Great Cairo, Egypt. One hundred and four samples (52 raw peanut sample and other 52 roasted peanut samples) were purchased from markets of all over Cairo. The samples were analyzed for aflatoxins and quantified by liquid chromatography equipped with fluorescence detector. The results indicated that more than 17 of 52 raw peanut samples were naturally contaminated with aflatoxin and 11 samples were violated the maximum residue limit (MRL). While only 5 of 52 samples of roasted peanut were naturally contaminated with aflatoxin and one sample were violated the MRL. The results were integrated with consumption data to develop a dietary exposure for Egyptian consumers. The percentages of estimation daily intake (EDI) of aflatoxin B1 were 8233% and 2948% for raw and roasted peanut, respectively.
Despite of the previous data the toxicological parameters analyzed i.e. total protein, albumin, ALT and AST activities, as well as the histopathology studies showed contrarily results when groups of rats were fed on raw and roasted peanut free of aflatoxins and raw and roasted peanut naturally contaminated with aflatoxins. The parameters were studied after zero time, two, four and six weeks. The changes in the last group of rats were irreversible, whereas changes in the other groups were reversible. From the biochemical analysis and histopathological lesions it was found that roasted peanut naturally contaminated with aflatoxins was more effective on liver function than raw peanut.
Key words: Aflatoxins, survey, estimation daily intake, toxicological
parameters, histopathological.