الفهرس 
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Abstract
— A total of 200 swabs were obtained from the side surfaces of 100 cow and buffalo carcasses (56 cows and 44 buffaloes). The carcasses swabbed were 50 from each of the two slaughter halls. The collected swabs were examined bacteriologically. The results revealed that: 1. The mean counts of total aerobic bacteria, Enterobacteriaceae, Coliform, Enterococci, Staphylococci and mould and yeast before dressing and evisceration in slaughter hall A were 8.91 x 10, 5.87 x 10, 9.06 x 102, 7.67 x 102,
5.63 x 10 and 5.15 x 105/cm2 of cattle carcass surfaces,
respectively. While after dressing and evisceration they were
1.40 x 10, 2.17 x 10, 1.49 x 10, 9.35 x 102, 7.55 x 10 and
6.94 x 10, respectively.
2. The mean counts of total aerobic bacteria, Enterobacteriaceae, Coliform, Enterococci, Staphylococci and mould and yeast in slaughter hail B before dressing and evisceration were 2.58 x 106, 1.23 x 10, 2.12 x 10, 3.38 x 10, 1.55 x 10 and 8.93 x 10, respectively. While after dressing and evisceration they were 1.68 x 108, 9.01 x l0,
•2.26 x 10, 2.02 x 10, 2.74 x 10, and 1.23 x 106, respectively.
3. There were significant differences (P<0.05) between the mean value of total bacterial count, Enterobacteriaceae count,
Coliform count, mould and yeast count before and after evisceration in slaughter hail A. While, there were no significant differences between the mean values of Enterococci and Staphylococci. In slaughter hall B, there were significant differences between the mean values of total aerobic bacterial count, Enterobacteriaceae count, Coliform count, Enterococci count, Staphylococci count and mould and yeast count/cm2 before and after dressing and evisceration of cattle carcasses.
4. There were significant differences between the mean values of Enterobacteriaceae count, Coliform count, Enterococci count and Staphylococci count between slaughter hall A and B, while there were no significant differences of total aerobic bacterial count and mould and yeast count of slaughter halls AandB.
5. The mean values of total aerobic bacterial count, Enterobacteriaceae count, Coliform count, Enterococci count, Staphylococci count and mould and yeast count of buffalo carcasses at slaughter hail A before dressing and evisceration were 5.48 x 1O, 5.40 x 10, 1.01 x 1O, 9.88 x 102, 5.36 x 10 and 4.93 x 10, respectively. While after dressing and evisceration they were 3.85 x 106, 1.80 x 10, 1.47 x 1O, 1.32 x 10, 1.07 x 10 and 5.61 x 10, respectively. In slaughter hall B before dressing and evisceration they were 2.54 x 106, 1.47 x 1O, 2.34 x 1O, 3.93 x 10, 2.17 x 10 and 5.83 x 10,
respectively. While after dressing and evisceration they were
2.39 x 10, 9.97 x 10, 1.66 x 104, 1.62 x 10, 3.33 x 10 and
8.74 x 1O, respectively.
6. There were significant differences between the mean values of total aerobic bacterial count, Enterobacteriaceae count, Coliform count and mould and yeast count before and after dressing and evisceration in slaughter hall A, while there were no significant differences in Enterococci count and Staphylococci count before and after dressing and evisceration. In slaughter hail B, there were significant differences (P<0.05) between total aerobic bacterial count, Enterobacteriaceae count, Coliform count, Enterococci count, Staphylococci count and mould and yeast count before and after dressing and evisceration.
7. There were significant differences (P<0.05) between the total aerobic bacterial count, Enterobacteriaceae count, Coiform count and Enterococci count of slaughter halls A and B. While, there were no significant differences betweeh the Staphylococci and mould and yeast count of slaughter halls A and B.
The hygienic significance of surface contamination as well as the recommended mesures to lower this contamination were discussed.