In Vitro Antibacterial and Time-Kill Evaluation of the Erythrina caffra Thunb. Extract against Bacteria Associated with Diarrhoea

Table 2

Antibacterial activity of the ethanolic extract of Erythrina caffra Thunb.

Tested bacterial isolates	Macrobroth dilution
	Ciprofloxacin			Ethanolic extract
	MIC	MBC	MICindex	MIC	MBC	MICindex
	𝜇g/mL			𝜇g/mL
Micrococcus luteus	0.1563	0.3125	2	39.1	78.1	2
Shigella flexneri KZN	0.0390	0.0781	2	156.3	312.5	2
Proteus vulgaris KZN	0.3125	0.6250	2	156.3	156.3	1
Proteus vulgaris CSIR 0030	0.1563	0.1563	1	39.1	39.1	1
Enterococcus faecalis KZN	0.1563	0.6250	2	78.1	78.1	1
Staphylococcus aureus OK3	1.2500	1.2500	1	39.1	78.1	2
Shigella sonnei (ATCC 29930)	0.1563	0.1563	1	312.5	312.5	1
Bacillus pumilus (ATCC 14884)	0.0391	0.0319	1	156.3	156.3	1
Escherichia coli (ATCC 25922)	0.0195	0.0195	1	625.0	625.0	1
Enterococcus faecalis (ATCC 29212)	0.6250	2.5000	4	156.3	156.3	1
Staphylococcus aureus (ATCC 6538)	0.3125	0.6250	2	312.5	312.5	1
Pseudomonas aeruginosa (ATCC 19582)	0.0781	0.1563	1	156.3	312.5	2