| Abstract: |
A total of 100 random and packaged fermented milk samples (40plain yogurt, 30 fruit yogurt and 30 ”laban raieb” samples were purchasedfrom different gorceries and supermarkets at Zagazig city, thentransferred to the laboratory with a minimum of delay to be examined forpresence of mould genera, Aspergillus species and aflatoxin BI & MIresidues .Rose bengal chloramphenicol plates showed that 34 (850/0) of plainyogurt and 30 (100%) each of fruit yogurt and ”laban raieb” sampleswere contaminated with moulds by counts ranged from 0 to 295, 20 to195 and 15 to 250 propagules (CFU) per ml with a mean values of 47.6 ±8.3,57.5 ± 6.6 and 89.7 ± 13 propagules/ml, respectively.Aspergillus, Penicillium, Mucor, Geotrichum, Acremonium,Alternaria and Arthrinium were the dominant mould genera contaminatedall surveyed samples as they obtained from 61, 41,14,13,11,11 and 9%of all tested samples consecutively. While Fusarium and Cladosporiumwere isolated only from fruit yogurt and ”laban raieb” samples.Furthermore, Synccphalastrum was recovered only from plain yogurt andfruit yogurt samples.A total of 1249 mould strains can be isolated from all samples andcategorized as 370 (29.8%) Aspergillus, 196 (15.8%) Geotrichum, 157(12.1%) Penicillium, 112 (9.0%) ,-~yncephalastrum, 110 (8.8%)Acremonium, 98 (7.9%) Cladosporium, 67 (5.40/0) Mucor, 64 (5.1%)Alternaria, 53 (4.3%) Fusarium and 22 (1.80/0) Arthrinium strains.
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