تلوث بعض أصناف الرز المخزن في الجو المفتوح بالفطريات وسم الافلا B1

Abstract EN

The aim of the research was to study the effect of storing four varieties of rice named Anbar and Aqrawi (two local varieties),and Basmati and Thai (two imported varieties) for four months .The study started through the 20th of January till 20th of May of the year 2018,on fungal and aflatoxin B1 contamination .

Moisture content ambient temperature and relative humidity were determind through the 4 months of study .

The total fungal counts as Cell Forming Unit (CFU) /gm and fungi distribution (as percentages) were determined as well as determination of content of aflatoxin B1.

The results showed that temperature and relative humidity ranged within the period of 20/1- 20/5/2018 were 11.32 - 25.86 ⁰C and 23.81-52.74% , respectively.

The moisture content in the four rice varieties ranged between 8.25-12.59 % .

The total fungal counts in rice varieties ranged between 13-92 x103 CFU/gm, while the two fungal species of A.flavus and A.niger prevailed in all rice varieties, yeast contamination was detected in rice varieties of Anbar, Aqrawi, and Basmati beside to the above mentend two fungi.

However, the thai rice was contaminated with Aspergillus sp.

and both of the above fungal species.

The four rice varieties studied were contaminated with Aflatoxin B1 from the beginning and through storage period and the toxin ranged between 13.24-230.43 μg/kg.

An increase of toxin was apparently found through the storage period especially during third and fourth months.