Antibacterial efficacy of leaf extracts of Combretum album Pers. against some pathogenic bacteria

Burman, Sunanda; Bhattacharya, Kuntal; Mukherjee, Devaleena; Chandra, Goutam

doi:10.1186/s12906-018-2271-0

BMC Complementary Medicine and Therapies

Table 1 Antibacterial Bioassay of different extracts of leaves of Combretum album and susceptibility test of some standard antibiotics

From: Antibacterial efficacy of leaf extracts of Combretum album Pers. against some pathogenic bacteria

Bacterial strains	Diameter of inhibition zone(mm)															Antibiotics ^a
	Crude extract	Cold aqueous extract (μg/ml)				Hot aqueous extract (μg/ml)				Ethanol extract (μg/ml)				Distilled water	DMSO	Ampicillin	Gentamycin	Penicillin G	Erythromycin	Tetracycline	Amoxicillin
	0.1%	50	100	200	400	50	100	200	400	50	100	200	400	100 μl/well	100 μl/well	(10 μgdisc)	(30 μg/disc)	(10 μg/disc)	(5 μg/dics)	(10 μg/disc)	(30 μg/disc)
Human pathogens	100 μl/well													100 μl/well	100 μl/well
B. subtilis (MTCC 441)	20.33 ± 0.33	21.33 ± 0.33	23.00 ± 0.58	24.33 ± 0.33	26.00 ± 0.58	18.00 ± 0.58	18.67 ± 0.33	19.67 ± 0.33	22.67 ± 0.33	23.67 ± 0.33	24.33 ± 0.33	25.67 ± 0.33	27.00 ± 0.00	0.00 ± 0.00	0.00 ± 0.00	0.00 ± 0.00	NA	0.00 ± 0.00	29.67 ± 0.33	29.00 ± 0.00	15.33 ± 0.33
E. coli (MTCC 739)	21.00 ± 0.00	16.33 ± 0.33	17.00 ± 0.00	18.33 ± 0.33	21.67 ± 0.88	16.67 ± 0.33	17.67 ± 0.33	18.33 ± 0.33	22.33 ± 0.67	17.33 ± 0.67	20.00 ± 0.58	21.67 ± 0.33	23.67 ± 0.33	0.00 ± 0.00	0.00 ± 0.00	NA	23.67 ± 0.88	NA	23.00 ± 0.58	24.00 ± 0.00	NA
P. aeruginosa (MTCC 2453)	22.00 ± 0.58	16.67 ± 0.33	17.67 ± 0.67	19.33 ± 0.33	21.00 ± 0.58	16.33 ± 0.33	17.33 ± 0.67	18.67 ± 0.33	20.33 ± 0.33	20.00 ± 0.58	22.33 ± 0.33	24.33 ± 0.33	27.33 ± 0.33	0.00 ± 0.00	0.00 ± 0.00	NA	27.33 ± 0.67	NA	23.33 ± 0.67	14.33 ± 0.67	NA
Fish pathogens
B. licheniformis (MTCC 530)	22.33 ± 0.33	17.67 ± 0.33	19.00 ± 0.00	19.67 ± 0.33	21.00 ± 0.00	18.67 ± 0.33	19.00 ± 0.00	20.33 ± 0.33	21.00 ± 0.58	22.00 ± 0.58	22.33 ± 0.33	25.33 ± 0.33	27.67 ± 0.33	0.00 ± 0.00	0.00 ± 0.00	0.00 ± 0.00	NA	0.00 ± 0.00	18.66 ± 0.33	22.00 ± 0.58	17.33 ± 0.33
B. mycoides (MTCC 7343)	21.33 ± 0.33	17.67 ± 0.33	20.33 ± 0.33	21.00 ± 0.58	22.33 ± 0.33	16.67 ± 0.33	18.33 ± 0.33	19.67 ± 0.33	22.00 ± 0.58	19.33 ± 0.67	20.67 ± 0.33	22.00 ± 0.58	24.67 ± 0.33	0.00 ± 0.00	0.00 ± 0.00	0.00 ± 0.00	NA	0.00 ± 0.00	26.00 ± 0.58	15.00 ± 0.00	12.00 ± 0.58
P. putida (MTCC 1654)	16.67 ± 0.33	16.00 ± 0.58	17.00 ± 0.58	18.00 ± 0.58	20.33 ± 0.33	16.67 ± 0.33	17.67 ± 0.33	19.00 ± 0.58	20.00 ± 0.58	16.33 ± 0.33	18.00 ± 0.00	19.67 ± 0.33	21.33 ± 0.33	0.00 ± 0.00	0.00 ± 0.00	NA	26.67 ± 0.33	NA	25.33 ± 0.33	14.33 ± 0.33	NA
P. fluoroscens (MTCC 103)	22.00 ± 0.00	17.33 ± 0.67	19.67 ± 0.33	21.67 ± 0.67	23.33 ± 0.33	21.00 ± 0.58	22.33 ± 0.67	23.00 ± 0.58	24.00 ± 0.58	21.33 ± 0.33	23.33 ± 0.33	25.00 ± 0.00	26.67 ± 0.33	0.00 ± 0.00	0.00 ± 0.00	NA	23.67 ± 0.33	NA	29.67 ± 0.33	14.00 ± 0.88	NA

^a Antibiotics were used based on their spectrum of activity i.e., their efficacy against gram positive, gram negative or both

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