الفهرس 
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Abstract
The current study was carried on a total of 150 samples of meat products represented as: minced meat, beef burger, sausage, pastirma, hot dog and luncheon (25 sample of each) which were randomly collected from five governorates in Egypt (Cairo, Qalubia, Giza, Behira, and Sharkia).
The objectives of this study were to determine the microbial quality of meat products samples including: total bacterial count; total Enterobacteriaceae count; isolation and identification of Pseudomonas and E. coli. In addition to total mold and yeast counts. Molecular identification for Pseudomonas, E. coli, and isolated mold were also detected.
In vitro investigation of the antimicrobial activity of 6 essential oils: Origanum vulgare L., Thymus vulgaris L., Foeniculum vulgare L., Pimpinella anisum L., Majorana hortensis L. Salvia officinalis L., and 2 vegetal extracts O. vulgare and S. officinalis against the isolated bacteria: Escherichia coli, P. aeruginosa and P. florescence and the isolated molds: Aspergillus flavus, A. niger, Penicillium digitatum, P. expansum, P commune and P. italicum.