Chemical Profiling and Biological Activities on Nepalese Medicinal Plant Extracts and Isolation of Active Fraction of Nyctanthes arbor-tristis

Table 5

Antimicrobial activity of different plant extracts against pathogenic bacteria.

Plant extracts	Bacteria	ZOI (mm) shown by the extracts at a concentration of 100 mg/mL	ZOI (mm) shown by chloramphenicol as control at 100 mg/mL
Neolamarckia cadamba	E. coli	—	26
	S. aureus	—	35
Desmostachya bipinnata	E. coli	—	26
	S. aureus	—	35
Nyctanthes arbor-tristis	E. coli	22	26
	S. aureus	26	35
Phoenix humilis	E. coli	11	26
	S. aureus	12	35
Pogostemon benghalensis	E. coli	—	26
	S. aureus	—	35
Equisetum debile	E. coli	9	26
	S. aureus	12	35
Litsea monopetala	E. coli	11	26
	S. aureus	14	35
Spilanthes uliginosa Swartz	E. coli	—	26
	S. aureus	—	35
Mallotus philippensis (seed)	E. coli	—	26
	S. aureus	—	35
Mallotus philippensis (seed cover)	E. coli	14	26
	S. aureus	24	35

Negative control = DMSO (no effective antibacterial activity); ZOI = zone of inhibition; E. coli: Gram-negative organism; S. aureus: Gram-positive organism.