Table 3 The antibacterial activities (MIC and MBC values) of peptide derivatives against both gram-positive and gram-negative bacteria

Gram-positive bacteria

Staphylococcus epidermidis

ATCC 35984^a

>250

(>250)

31.25

(62.5)

7.81

(7.81)

15.63

(31.25)

15.63

(15.63)

Staphylococcus aureus

ATCC

25923^a

>250

(>250)

62.5

(62.5)

15.63

(15.63)

>250

(>250)

3.91

(3.91)

Bacillus cereus

ATCC 11778^a

>250

(>250)

15.63

(15.63)

7.81

(7.81)

250

(250)

3.91

(3.91)

Listeria monocytogenes

10403s

>250

(>250)

15.63

(31.25)

7.81

(7.81)

31.25

(62.5)

3.91

(3.91)

Gram-negative bacteria

Pseudomonas aeruginosa

ATCC 27853^a

>250

(>250)

15.63

(31.25)

15.63

(15.63)

62.5

(125)

15.63

(15.63)

Salmonella Typhimurium

ATCC 13311^a

>250

(>250)

62.5

(62.5)

7.81

(15.63)

31.25

(62.5)

3.91

(3.91)

Escherichia coli

ATCC 25922^a

>250

(>250)

31.25

(31.25)

31.25

(31.25)

250

(250)

31.25

(31.25)

Acinetobacter baumanii

MT strain^b

>250

(>250)

62.5

(62.5)

7.81

(7.81)

31.25

(31.25)

7.81

(7.81)

MHC^c (µg/mL)

15.63

1.95

15.63

>250

<0.98

GM +^d

>250

31.25

9.77

199.22

6.84

TI +^e

0.03

0.06

1.60

2.51

0.07

GM-^f

>250

42.97

15.63

93.75

14.65

TI-^g

0.03

0.05

1

5.33

0.03