Table 1.

Average log(CFU cm-²) for biofilm thermal shock experiments.

Thermal shock Temp. (°C)	Exposure time (min)
	1	2	5	10	15	20	30
37	8.68 ± 0.38	8.37 ± 0.68	8.15 ± 0.51	8.79 ± 0.58	8.46 ± 0.78	8.34 ± 0.48	9.08 ± 0.70
50	8.21 ± 0.29	8.07 ± 0.50	7.65 ± 0.62	7.41 ± 0.27	7.66 ± 0.55	6.92 ± 0.61	6.88 ± 0.64
60	7.38 ± 0.59	7.47 ± 0.79	5.59 ± 0.78	5.32 ± 1.38	5.03 ± 0.87	4.14 ± 0.50	4.69 ± 0.76
70	6.13 ± 0.65	4.92 ± 0.65	4.51 ± 0.93	3.99 ± 0.59	3.63 ± 0.55	4.38 ± 0.77	3.69 ± 0.72
80	4.66 ± 0.69	4.36 ± 1.09	3.64 ± 0.76	3.23 ± 0.22	4.21 ± 0.60	3.21 ± 0.62	2.58 ± 0.61

Heat shocks at 37°C were comparable controls. As heat shock temperature or exposure time increases, the average log(CFU cm⁻²) decreases. SDs (n ≥ 9) are indicated with ±. Bright red cells indicate large CFU densities while bright blue cells indicate low CFU densities.