Zones of inhibition of pathogenic bacteria after treatment with NF and ZNF NPs^a.

Conc. (μg ml−1)	E. coli		P. aeruginosa		K. pneumoniae		S. typhi		S. aureus		MRSA
	NF	ZNF	NF	ZNF	NF	ZNF	NF	ZNF	NF	ZNF	NF	ZNF
1000	12 ± 0.3	12 ± 0.2	12 ± 0.5	12 ± 0.5	12 ± 0.4	13 ± 0.2	11 ± 0.1	12 ± 0.4	14 ± 0.2	14 ± 0.4	12 ± 0.5	13 ± 0.5
600	11 ± 0.4	12 ± 0.9	11 ± 0.1	11 ± 0.2	11 ± 0.3	12 ± 0.2	11 ± 0.5	12 ± 0.2	14 ± 0.3	14 ± 0.4	12 ± 0.2	12 ± 0.3
300	10 ± 0.5	11 ± 0.5	10 ± 0.1	9 ± 0.5	10 ± 0.3	10 ± 0.2	10 ± 0.4	11 ± 0.1	13 ± 0.1	11 ± 0.5	12 ± 0.5	12 ± 0.5
100	10 ± 0.3	9 ± 0.5	10 ± 0.1	9 ± 0.2	10 ± 0.3	9 ± 0.5	10 ± 0.6	10 ± 0.1	13 ± 0.4	10 ± 0.7	11 ± 0.2	11 ± 0.5
50	10 ± 0.2	9 ± 0.3	9 ± 0.2	8 ± 0.1	9 ± 0.1	9 ± 1.3	9 ± 0.4	8 ± 0.5	12 ± 0.9	10 ± 0.1	10 ± 0.1	10 ± 0.6
PC	13 ± 0.1	14 ± 0.5	16 ± 0.2	19 ± 2	13 ± 0.4	14 ± 0.5	17 ± 0.6	15 ± 0.4	18 ± 1.9	18 ± 1.2	14 ± 0.9	16 ± 1
VC	0 ± 0	0 ± 0	0 ± 0	0 ± 0	0 ± 0	0 ± 0	0 ± 0	0 ± 0	0 ± 0	0 ± 0	0 ± 0	0 ± 0

^aNF = NiFe₂O₄, ZNF = Zn–NiFe₂O₄, PC = positive control, VC = vehicle control.