Table 3. Calculated time for a 4-log reduction of five Legionella strains at five different temperatures.

Inactivation kinetics adjusted to first-order models (straight line). R² values showed the robustness of the models.

Legionella strains	Calculated time (min) to reduce 4 logs
	50°C	R2	55°C	R2	60°C	R2	65°C	R2	70°C	R2
L. pneumophila sg. 1 ATCC 33152	117	0.8	10	0.92	2	0.90	0.8	0.88	0.9	0.79
L. pneumophila sg. 1 env.	46	0.84	8	0.98	3	0.83	1.4	0.90	0.6	0.82
L. pneumophila sg. 7 ATCC 33823	40	0.97	25	0.96	3	0.76	0.6	0.87	1.2	0.77
L. pneumophila sg. 8 env.	68	0.97	16	0.89	4	0.94	0.8	0.90	0.7	0.99
L. longbeachae ATCC 33462	15	0.94	2	0.88	—-	—-	—-	—-	—-	—-