الفهرس 
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Abstract
A total of 156 samples of broiler skin and muscles were collected randomly from 78 broiler carcasses before washing, after chilling and after freezing (26 of each), slaughtered in a modern processing poultry plant, and the collected samples were examined bacteriologically and mycologically. The bacteriological examination revealed that the total aerobic counts of skin (Log. mean 2.46) were higher than those of muscles samples (Log. mean 1.98). Moreover, the total aerobic counts in an overall log. mean of examined samples after chilling (2.49) were higher than those before washing and after freezing (2.47 and 1.70, respectively). There is a significant difference (PS-0.05) between the sampling regions and processing and the interaction between them was significant. The total Psychrotrophic counts in an overall log. mean of examined samples before washing, after chilling and after freezing were 3.07, 3.64 and 4.20, respectively. Psychrotrophic counts of skin samples (3.92) were higher than those of muscles samples (3.35). Differences between the sampling regions and processing stages were significant but the interaction between them appeared non significant. The total Enterobacteriaceae counts in an overall log. mean of examined samples before washing (2.42) were significantly higher than those after chilling (1.91) and after freezing (1.49). The differences between skin and muscles samples (log. mean 2.07 and 1.81, respectively) were significant in their effects on the total Enterobactreiaceae counts. Concerning the total Coliforn counts, the obtained results revealed that the log. mean counts of examined samples before washing, after chilling and after freezing were 1.21, 1.14 and 1.31, respectively, with significant differences between them. however, the coliform counts of skin samples 41.45) were significantly higher than those of muscles samples (0.99). The total Staphylococcus aureus counts in an overall log mean of skin samples (1.98) were higher than those of muscles samples (1.50) with significant differences between them. Moreover, the log. mean of Staphylococcus aureus counts before washing, after chilling and after freezing were 2.23, 1.78 and 1.21, respectively, with significant differences between them. The mycological examination declared that the total mould counts in an overall log. mean of examined samples before washing (2.41) were higher than those after chilling and after freezing (1.84 and 1.12, respectively) with significant differences between them. The differences between skin and muscles samples (2.06 and 1.52, respectively) were significant in their effects on the total mould counts. In an overall log. mean, the total yeast counts of examined smaples before washing, after chilling and after freezing were 1.94, 1.29 and 0.26, respectively, with significant differences between them. Moreover, the yeast counts of skin samples (1.29) were significantly higher than those of muscles samples (1.04). It is evident from the achieved results that the interaction between the sampling regions and processing stages was non significant in their effects on total Enterobacteriaceae counts, total caliform counts, total Staphylococcus aureus counts, total mould counts and total yeast counts. Regardless of the sampling regions and processing stages, bacteria belonging to the following general could be isolated; Enterobacter, Klebsiella, Citrobacter, Proteus; Serratia, Pseudomonas, Alcaligenes, Achromobacter, Flavobacterium, Acinetobacter,Aeromonas, Staphylococcus aureus, Staphyloccus epidermidis and Micrococcus with varying percentages. Serratia and Acinetobacter were isolated from examined skin samples but they could not be isolated from muscles samples. Furthermore, Salmonella and E. coli could not be isolated from all of the examined samples of skin and muscles at different stages. Importance of the isolated microorganisms as well as suggested hygienic measured to improve the quality of the processed poultry meat were discussed.