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Abstract One hundred and twenty samples, 60 each of Kariesh and Ras cheese samples were collected from supermarkets, dairy shops and street vendors in Al-Menofia governorate at consumer level for detection, enumeration, isolation and identification of enterobacteriaceae in the collected samples, the second part involve the antimicrobial activity of some probiotics against different isolated members of family enterobacteriaceae in additional to the effect of L. acidophillus on the count of EHEC strain in laboratory prepared Domiati cheese during its manufacture and storage period as in vivo experiment. 7.1. Enterobacteriaceae in some locally produced cheese 7.1.1. The incidence and the count of enterobacteriaceae Enterobacteriaceae could be detected in 100% and 51.67% of the examined Kariesh and Ras cheese samples respectively with a mean count value of 16x105± 3x105 and 21x103± 10x103 CFU/g respectively. 7.1.2. The isolated members of family enterobacteriaceae. E. coli could be isolated from 31.67% and 16.67% of the examined Kariesh and Ras cheese samples respectively. C. amanolyticus, C. diversus, C. freundii, Ent. aerogens, Ent. cloace, Ent. gergovie, Ent. intermidus, E. coli, E. adecarboxylata, E. fergusonii, E. vulneris, H. alvei, K. ozoane, K. rhinoscleromatis, Panto agglomerans, P. penneri, P. mirabilis, P. stuartii, S. fonticola, S. liqufeciens and S. rubidae could be isolated from examined Kariesh and Ras cheese samples at different percentages. |