الفهرس | Only 14 pages are availabe for public view |
Abstract A total of 50 samples of smoked fish wee collected from the market of Monofia Governorate and subjected to organoleptic examination, microbiological examination and determination of TBA value. The organoleptic examinations revealed that 8% of samples had macerated skin, 24% dark brown color, 14% had bitter taste, 8% musty odor and 30% had burst belly. It was proved that 8% had bitter taste with burst belly, 6% had very macerated skin with burst belly and 4% had very macerated skin, bitter taste and burst belly. The microbiological examination revealed that the frequency percentage distribution of microbiological counts > 103-104 for APC, Enterobacteriaceae, S. aureus, mould and yeast and Clostridium perfringens were 40, 0, 34, 46 and 0%, respectively. The identified isolates of Enterobacteriaceae were Proteus morgani, Citrobacter freundi, Proteus mirabilis, Citrobacter diversus and Shigella flexeniri. The isolated mould species were Pencillium (58%), Aspergillus (24%), Muco (22%), Cladosporium (10%), Alternaria (6%) and Fusarium (4%). The isolated yeast genera were Rhodotrula (24.7%) Saccharomyces (22.8%), Torulopsis (18.9%), Candida (16.0%), Trichosporon (11.4%) and Dearomyces (7.6%). Concerning TBA value, the oxidized oils were present in 12% of the samples with minimum TBA value of 0.65 and maximum 4.85, while the mean was 1.54 MD/kg. |