. 2021 Jul 23;22(15):7892. doi: 10.3390/ijms22157892

Table 4.

Minimal concentrations inhibiting further growth of biofilm cells, biofilm reduction and biofilm metabolic activity with their respective inhibitory rates of PtNPs for biofilms. Data represent the mean of at least three independent replicates. The significance of the results was verified by t-test (p ≤ 0.05).

BACTERIAL STRAIN	PtNPs (mg/L)
BACTERIAL STRAIN	MICBC₈₀	A₆₂₀ Inhibition (%)	MICBR₈₀	A₅₉₅ Inhibition (%)	MICMPB₈₀	A₅₉₅ Inhibition (%)
S. aureus 816	101	87.3 ± 5.4	101	84.5 ± 0.5	101	100.0 ± 0.0
S. aureus 1241	101	87.2 ± 4.6	101	83.0 ± 2.3	101	100.0 ± 0.0
L. monocytogenes 149	101	98.8 ± 2.3	>101	34.2 ± 5.2	101	99.6 ± 15.6
L. monocytogenes 164	101	95.8 ± 1.9	>101	68.1 ± 12.9	101	97.2 ± 2.8
E. coli 683/17	50.5	78.0 ± 4.5	>101	14.2 ± 24.3	101	98.9 ± 2.2
E. coli 693/17	50.5	80.7 ± 2.3	>101	15.6 ± 21.2	101	97.8 ± 2.2
E. coli 815	101	95.4 ± 0.2	>101	3.9 ± 6.6	101	87.6 ± 12.4
E. coli 859	50.5	81.8 ± 2.9	>101	53.9 ± 1.4	101	100.0 ± 0.0
S. Infantis S13	101	98.9 ± 0.1	>101	31.5 ± 27.0	101	100.0 ± 0.0
S. Infantis S59	101	99.1 ± 0.5	>101	42.2 ± 13.2	101	100.0 ± 2.5

PtNPs: 101, 50.5, 25.25, 12.63, 6.3, 3.16 mg/L (6 different concentrations); bold font marks the efficiency of ≥80%; MICBC₈₀ marks minimum inhibitory concentrations for further growth of biofilm cells; MICBR₈₀ marks minimum inhibitory concentrations for biofilm reduction; MICMPB₈₀ marks minimum inhibitory concentrations for metabolic activity of preformed biofilm.