Table 4.

Determination coefficient values of R² explaining the % variation in biofilm formation factors by principal components.

Variables	C. sakazakii		Bacillus spp.		Klebsiella spp. 3		E. hormaechei 2		E. cloacae 2		Salmonella ent. Typh.
	C1	C2	C1	C2	C1	C2	C1	C2	C1	C2	C1	C2
S_8h_25	0.98	0.02	0.98	0.02	0.37	0.63	0.97	0.03	0.48	0.52	n.d.	n.d.
S_12h_25	0.99	0.01	0.99	0.01	1.00	0.00	0.47	0.53	0.97	0.03	n.d.	n.d.
S_24h_25	0.98	0.02	0.98	0.02	0.99	0.01	0.85	0.15	0.18	0.82	n.d.	n.d.
S_48h_25	0.08	0.92	0.08	0.92	0.04	0.96	0.00	1.00	0.01	0.99	n.d.	n.d.
M_8h_25	0.52	0.48	0.52	0.48	0.52	0.48	0.45	0.55	0.80	0.20	n.d.	n.d.
M_12h_25	0.99	0.01	0.99	0.01	0.96	0.04	0.97	0.03	0.98	0.02	n.d.	n.d.
M_24h_25	0.90	0.10	0.90	0.10	0.44	0.56	0.99	0.01	1.00	0.00	n.d.	n.d.
M_48h_25	0.96	0.04	0.96	0.04	0.10	0.90	0.19	0.81	0.13	0.87	n.d.	n.d.
L_8h_25	0.98	0.02	0.98	0.02	1.00	0.00	0.84	0.16	0.68	0.32	n.d.	n.d.
L_12h_25	0.98	0.02	0.98	0.02	0.99	0.01	1.00	0.00	0.98	0.02	n.d.	n.d.
L_24h_25	0.98	0.02	0.98	0.02	0.99	0.01	0.97	0.03	0.98	0.02	n.d.	n.d.
L_48h_25	0.91	0.09	0.91	0.09	0.02	0.98	0.26	0.74	1.00	0.00	n.d.	n.d.
S_8h_37	1.00	0.00	1.00	0.00	0.63	0.37	0.95	0.05	0.87	0.13	0.81	0.82
S_12h_37	0.42	0.58	0.42	0.58	0.90	0.10	0.98	0.02	0.95	0.05	0.91	1.00
S_24h_37	0.30	0.70	0.30	0.70	0.83	0.17	0.12	0.88	0.84	0.16	0.68	0.78
S_48h_37	0.34	0.66	0.34	0.66	0.15	0.85	0.25	0.75	0.91	0.09	0.99	1.00
M_8h_37	0.56	0.44	0.56	0.44	0.99	0.01	0.09	0.91	0.97	0.03	0.41	0.95
M_12h_37	0.68	0.32	0.68	0.32	0.98	0.02	0.08	0.92	0.68	0.32	0.98	0.98
M_24h_37	0.48	0.52	0.48	0.52	0.01	0.99	0.25	0.75	0.00	1.00	0.91	0.98
M_48h_37	0.00	1.00	0.00	1.00	0.07	0.93	0.56	0.44	0.39	0.61	0.98	1.00
L_8h_37	0.14	0.86	0.14	0.86	0.42	0.58	0.89	0.11	1.00	0.00	0.72	0.99
L_12h_37	1.00	0.00	1.00	0.00	0.00	1.00	0.53	0.47	0.76	0.24	0.83	1.00
L_24h_37	0.71	0.29	0.71	0.29	0.98	0.02	0.40	0.60	0.98	0.02	0.55	0.80
L_48h_37	0.64	0.36	0.64	0.36	0.45	0.55	0.99	0.01	0.19	0.81	0.60	0.99

n.d.—not detectable biofilm; C1: component 1; C2: component 2.