Antibacterial and Antibiofilm Activities of the Photothermal Therapy Using Gold Nanorods against Seven Different Bacterial Strains

Table 1

Minimum inhibitory concentration (MIC) and minimum bactericide concentration (MBC) of AuNRs and AuNRs PPTT.

Microorganisms	MIC	MIC range	MBC	MBC range
AuNRs
E. faecalis	1.41 ± 0.69	1.50–0.37	4.7 ± 1.64	6.12–3.0
S. aureus	6.52 ± 4.78	12.50–1.5	10.84 ± 6.81	24.5–1.5
S. mutans	2.20 ± 1.19	3.00–0.37	5.08 ± 3.15	12.5–3
S. sobrinus	1.84 ± 1.75	6.12–0.37	2.86 ± 2.05	6.12–0.75
S. oralis	2.00 ± 0.75	3.00–1.5	2.5 ± 0.75	3.0–1.5
S. salivarius	4.38 ± 4.51	12.25–1.5	6.09 ± 3.77	12.25–3
E. coli	6.88 ± 7.97	24.5–0.75	7.44 ± 7.54	24.5–3
AuNRs PPTT
E. faecalis	0.45 ± 0.16	0.75–0.37	0.83 ± 0.25	1.5–0.75
S. aureus	3.9 ± 3.52	12.5–1.5	6.12 ± 2.74	12.5–3.0
S. mutans	0.99 ± 0.81	3.0–0.37	2.17 ± 1.68	6.1–0.75
S. sobrinus	0.58 ± 0.20	0.75–0.37	1.04 ± 0.45	1.5–0.75
S. oralis	0.62 ± 0.19	0.75–0.37	0.87 ± 0.37	1.5–0.37
S. salivarius	0.74 ± 0.46	1.5–0.37	1.16 ± 0.76	1.5–0.75
E. coli	1.25 ± 0.37	1.5–0.75	2.08 ± 0.90	3.0–0.75

All values are expressed as µg/mL. The laser group shows no antibacterial effect.