). At 15 °c, no significant (p≥0.05) difference in counts (8.6 to 8.9 log CFU/ml or g) of total suspended bacterial populations was observed among the case of attached total bacterial populations to stainless steel, counts of attached cells after 168 h of storage were higher (p<0.05) when coupons were suspended in fat-lean homogenate (7.1 log CFU /cm²) ,followed by TSB (6.6 log CFU/cm²) and ground beef (6.0 log CFU/cm²), whereas on HDPE surfaces, counts of attached cells increased to similar (p≥0.05)levels (6.2 to 6.8 log CFU/cm²) in all three substrates (Fig2).
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