Table 5.

Comparison of antimicrobial activity of extract and silver and gold nanoparticles and plant extract from Shimla [inhibition in mm (300 µg/ml)]. ES—rhizome extract of C. longa collected from Shimla, AgS—silver nanoparticles of sample collected from Shimla, AuS—gold nanoparticles of sample collected from Shimla.

S. no.	NPs	Bacterial strains	Inhibition zones
1	ES	B. subtilis	10.66 ± 0.57
2	ES	E. coli	9.66 ± 0.57
3	AgS	B. subtilis	18.66 ± 1.54
4	AgS	E. coli	14.33 ± 0.57
5	AuS	B. subtilis	16.68 ± 0.57
6	AuS	E. coli	13.33 ± 0.57