الفهرس 
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Abstract
A total of 60 scrapped swap samples from poultry contact surfaces were collected from poultry slaughter houses establishments located in Alexandria (A) and
AL- Boheira (B) governorates and analyzed for naturally occurring biofilms.
The results of the present study revealed that:
The mean values of Aerobic mesophilic count are 6.8x106 ± 2.4 x106 Cfu/ cm2 from biofilms of poultry processing plant A and 1.4 x106 ± 6.0 x105 Cfu/ cm2 from biofilms of poultry processing plant B.
While the mean values of Aerobic spore forming count are 1.1 x105 ± 4.0 x104 Cfu/ cm2 from biofilms of poultry processing plant A and 1.2 x105 ± 5.0 x104 Cfu/ cm2 from biofilms of poultry processing plant B.
The mean values of Coliform count are 2.9 x106 ± 7.0 x105 Cfu/ cm2 from biofilms of poultry processing plant A and 2.6x105 ± 2.0 x105 Cfu/ cm2 from biofilms of poultry processing plant B.
Also Enterobacteriaceae count mean values are 4.3 x106 ± 1.4 x106 Cfu/ cm2 from biofilms of poultry processing plant A and 8.0 x105 ± 4.0 x105 Cfu/ cm2 from biofilms of poultry processing plant B.
The mean values of Molds count are 3.01 x104 ± 7.0 x103 Cfu/ cm2 from biofilms of poultry processing plant A and 1.1 x104 ± 2.0 x103 Cfu/ cm2 from biofilms of poultry processing plant B.
In addition, the mean values of Staphylococcus aureus count are 2.4x104 ± 5.0x103 Cfu/ cm2 from biofilms of poultry processing plant A and 8.0 x103 ± 2.0x103 Cfu/ cm2 from biofilms of poultry processing plant B.
While the mean values of Yeast count are 4.3 x105 ± 3.7 x105 Cfu/ cm2 from biofilms of poultry processing plant A and 5.0 x104 ± 9.0 x103 Cfu/ cm2 from biofilms of poultry processing plant B.
The identified Mold species include : (Asp. Flavus , Asp. Fumgatus , Asp. Parasiticus , Asp. Vesicolor , Asp. Candidus , Asp. Niger , Alternaria alternate spp. , Alternaria spp., Cladosporium spp., Fusarium spp., Penicillium spp. and Trichoderma spp.) could be isolated in different ratios from poultry processing plants A and B.
The identified Salmonella include : ( S. Anatum , S. Enteritidis , S. Kentucky , S. Typhimurium and S. Virchow ) could be isolated in different ratios from poultry processing plants A and B.
Data presented in this study revealed that:
The identified strains isolated from the tested food contact surfaces may have a great public health importance as they contain food poisoning and spoilage microorganisms. Their higher count in the samples may be responsible for increasing contamination probability. The hygienic importances and the public health significance of isolated microorganisms were discussed previously.