Table 1.
Weibull modeling parameters for Salmonella Typhimurium survivability on the food-contact surfaces.
| Water treatment | Parameters | Surface types |
|||
|---|---|---|---|---|---|
| Stainless steel | Plastic | Rubber | Egg shell | ||
| Without | b ± SE | 3.36 ± 1.10 | 2.88 ± 0.67 | 6.44 ± 2.24 | 18.6 ± 4.72 |
| n ± SE | 0.37 ± 0.02 | 0.37 ± 0.01 | 0.42 ± 0.03 | 0.47 ± 0.03 | |
| dR ± SE | 204.04 ± 23.90a,B,C | 176.86 ± 14.50a,C | 241.33 ± 30.23a,B | 485.37 ± 31.14b,A | |
| R2 | 0.99 | 0.99 | 0.98 | 0.98 | |
| With | b ± SE | 3.54 ± 0.72 | 2.67 ± 0.65 | 5.71 ± 3.43 | 9.62 ± 2.28 |
| n ± SE | 0.42 ± 0.01 | 0.41 ± 0.02 | 0.42 ± 0.05 | 0.28 ± 0.01 | |
| dR ± SE | 133.28 ± 10.94b,B,C | 112.17 ± 11.44b,C | 216.75 ± 55.05a,B | 2,436.52 ± 35.81a,A | |
| R2 | 0.99 | 0.99 | 0.96 | 0.99 | |
Values are mean ± SE.
b = scale parameter; n = shape parameter (concave upward survival curve if n < 1, concave downward if n > 1, and linear if n = 1); dR = time (h) required to reduce the bacterial biofilm by 99%; R2 = correlation coefficient (a higher R2 value indicates a better fit to the data). Means in the same column with superscript lowercase letters are significantly different via Duncan's multiple range test (P < 0.05). Means in the same row with superscript uppercase letters are significantly different via Duncan's multiple range test (P < 0.05).