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Table 3 MICs and MBC of compounds from the bark of Erythrina sigmoidea on selected bacteria

From: Antibacterial activities of the methanol extracts and compounds from Erythrina sigmoidea against Gram-negative multi-drug resistant phenotypes

Bacterial strains

Tested compounds, MIC and MBC (μg/ml) and ratio MBC/MIC

1

2

3

4

5

6

MIC

MBC

MBC/MIC

MIC

MBC

MBC/MIC

MIC

MBC

MBC/MIC

MIC

MBC

MBC/MIC

MIC

MBC

MBC/MIC

MIC

MBC

MBC/MIC

Escherichia coli

                  

ATCC8739

-

-

na

-

-

na

512

-

na

256

-

na

512

-

na

8

-

na

AG100ATET

-

-

na

128

-

na

-

-

na

256

-

na

512

-

na

32

-

na

AG102

-

-

na

-

-

na

512

-

na

128

512

4

512

512

1

-

-

na

Enterobacter aerogenes

                  

ATCC13048

-

-

na

-

-

na

-

-

na

512

-

na

-

-

na

-

-

na

EA289

-

-

na

-

-

na

-

-

na

-

-

na

-

-

na

-

-

na

Enterobacter cloacae

                  

ECCI69

-

-

na

-

-

na

-

-

na

-

-

na

-

-

na

8

512

64

Klebsiella pneumoniae

                  

ATCC11296

-

-

na

-

-

na

-

-

na

 

-

 

-

-

na

-

-

na

KP55

-

-

na

-

-

na

256

-

na

256

512

2

512

-

na

8

-

na

Providencia stuartii

                  

ATCC29916

-

-

na

-

-

na

256

-

na

256

-

na

512

-

na

-

-

na

NAE16

-

-

na

-

-

na

-

-

na

256

-

na

512

-

na

8

-

na

Pseudomonas aeruginosa

                  

PA01

-

-

na

-

-

na

256

-

na

256

-

na

512

-

na

8

-

na

PA124

-

-

na

-

-

na

-

-

na

-

-

na

-

-

na

256

-

na

  1. sigmoidin I (1); atalantoflavone (2); bidwillon A (3); neocyclomorusin (4); 6α-hydroxyphaseollidin (5); neobavaisoflavone (6); (−): MIC or MBC >512 μg/mL; nt: not tested as MIC was >512 μg/mL