Antidiarrheal and Antibacterial Activities of Calpurnia aurea: Benth Seed Different Extracts

Table 5

Antibacterial effects of aqueous and 80% methanol seed extracts of C. aurea using disk diffusion techniques.

	Zone of inhibition
	Name of bacterial strain
Category of test	Concentration	E.coli (ATCC25922)	S.aureus (ATCC25923)	S.soni (ATCC12022)	S. typhimurium (ATCC13331)
Methanol extract	1000 mg/ml	12.7 ± 0.17	11.57 ± 0.09	9.50 ± 0.18	9.20 ± 0.06
	500 mg/ml	11.54 ± 0.34	10.00 ± 0.06	—	8.70 ± 0.1
	250 mg/ml	9.9 ± 0.06	7.5 ± 0.01	—	8.00 ± 0.15
	125 mg/ml	9.51 ± 0.11	7.25 ± 0.13	—	7.34 ± 0.09
	Cipro5 μg/disc	28 ± 0.15	26.00 ± 0.15	28.00 ± 0.17	27.00 ± 0.1
Aqueous extract	1000 mg/ml	—	8.73 ± 0.09	—	8.70 ± 0.15
	500 mg/ml	—	7.7 ± 0.02	—	7.30 ± 0.15
	250 mg/ml	—	6.48 ± 0.14	—	—
	125 mg/ml	—	—	—	—

Values are expressed as Mean ± S.E.M (n = 3). The negative control showed no antibacterial activity  = positive control, cipro = ciprofloxacin, — = no activity, The values are the average of triplicate tests. ATCC—American type culture collection, E. coli = Escherichia coli, S. aureus = Staphylococcus aureus, S. soni = Shigella soni, S. typhimurium = Salmonella typhimurium.