الفهرس 
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Abstract
Fifty random samples of raw milk were collected from
different dairy farms and dairy shops in Sharkia Govemorate,
Egypt. A survey was conducted to determine the hygienic quality of
the examined raw milk samples and public health hazards by
applying bacteriological examination and antibiotic resistance of S.
aureus to different antibiotics. Also the inhibitory effect of L.
rhamnosus (ATCC 53103) on S. aureus was determined.
Staphylococcus spp. was detected in all dairy farms and
dairy shops raw milk samples with mean values of 7.04xl05
±0.26xI05 cfu/ml and 7.64x105 ±O.l5x105 cfu/ml, respectively.
S. aureus, S. epidermidis and S. Saprophyticus were isolated
from dairy farms raw milk samples with percentages of 52.00%,
28.00% and 20.00%, respectively. While the same strains were
isolated from dairy shops raw milk samples with percentages of
76.00%, 16.00% and 8.00%, respectively. Ten S. aureus isolates
were identified by using MALDI- TOF MS. (Vitek MS) .
Resistance profile of ten S.aureus isolates (5 each of dairy
farms and dairy shops raw milk samples ) were examined by using
of the Vitek 2 system against Nitrofurantoin, Ciprofloxacin,
Gentamycin, Levofloxacin, QuinupristinlDalfopristin, Linezolide,
Vancomycin, Oxacilline, Moxifloxacin, Erythromycin, Clindamycin,
Tetracycline and Pencillin. It was found that the drug of choice for
S. aureus infection Treatment was Nitrofurantoin.