In Vitro Antimicrobial and Antiprotozoal Activities, Phytochemical Screening and Heavy Metals Toxicity of Different Parts of Ballota nigra

Table 3

Antibacterial activity of Ballota nigra leaves.

Test microorganisms	Zone of inhibition (mm)
	Crude		n-Hexane		Chloroform		Ethyl acetate		n-Butanol		Aqueous		Standards
Crude extract/fraction (𝜇g/𝜇L)	2/1	2/1	2/1	2/1	2/1	2/1	2/1	2/1	2/1	2/1	2/1	2/1	Amx*	Lev**
Salmonella typhi	—	—	—	—	11	12	—	—	13	14	—	—	—	28
Staphylococcus aureus	09	10	10	09	13	14	11	10	12	12	10	11	—	29
Proteus mirabilis	11	13	—	—	11	12	—	—	13	14	—	—	—	26
Klebsiella pneumoniae	12	11	18	17	16	16	14	15	16	16	—	—	—	28
Escherichia coli	17	16	08	08	17	16	13	14	13	11	—	—	—	22
Enterococcus faecalis	16	14	—	—	12	13	—	—	10	10	10	11	—	29

(—): no inhibition zone, *amoxicillin: 5 𝜇g/𝜇L, and **levofloxacin: 5 𝜇g/𝜇L.