Table 1 Zones of inhibition and minimum inhibitory concentrations (MICs) of the latex and compounds isolated from Aloe trigonantha

Bacillus pumilus 82

6.0 ± 0.0

6.0 ± 0.0^a

6.0 ± 0.0^a

10.0 ± 0.5^b

6.0 ± 0.0^a

19.0 ± 1.3

-

-

-

200

-

B. subtilis ATCC 6633

6.0 ± 0.0

6.0 ± 0.0^a

6.0 ± 0.0^a

10.0 ± 0.6^b

6.0 ± 0.0^a

18.0 ± 0.7

-

-

-

200

-

Escherichia coli 3:37C

15.0 ± 0.9

15.0 ± 1.2^a

15.0 ± 0.9^a

14.5 ± 0.5^a

15.0 ± 0.7^a

16.5 ± 0.8

50

25

25

10

25

E. coli 872

15.0 ± 0.7

14.5 ± 0.9^a

14.5 ± 0.6^a

14.5 ± 0.4^a

14.5 ± 1.2^a

16.0 ± 0.9

50

25

25

10

25

E. coli CD/99/1

15.0 ± 0.8

15.0 ± 0.7^a

15.0 ± 0.8^a

15.5 ± 0.9^a

15.0 ± 0.9^a

17.0 ± 1.4

50

25

25

10

25

E. coli K88

16.5 ± 1.1

15.5 ± 0.5^b

15.5 ± 1.2^b

15.0 ± 1.0^b

15.5 ± 0.9^b

17.0 ± 0.5

50

50

25

10

25

E. coli LT37

15.5 ± 0.6

14.5 ± 0.4^b

14.5 ± 1.1^b

14.5 ± 1.0^b

14.5 ± 0.5^b

16.0 ± 0.8

50

25

25

10

25

E. coli NCTC 5933

15.5 ± 1.2

15.0 ± 0.9^a

14.5 ± 0.9^b

14.5 ± 0.5^b

15.0 ± 0.8^a

16.0 ± 0.6

50

50

50

10

25

E. coli NCTC 7360

16.5 ± 1.0

15.5 ± 1.1^b

14.5 ± 0.6^b

14.5 ± 0.7^b

15.5 ± 0.7^b

17.0 ± 1.3

50

50

50

10

25

E. coli ROW 7/12

15.5 ± 0.7

15.0 ± 0.9^a

15.0 ± 0.5^a

14.5 ± 0.2^a

15.0 ± 0.6^a

16.5 ± 0.4

50

25

25

10

25

Salmonella enterica TD 01

16.5 ± 0.9

15.0 ± 0.6^b

13.5 ± 0.8^b

12.5 ± 0.5^b

16.0 ± 1.2^a

19.0 ± 0.9

50

50

100

50

25

S. typhi Ty2

15.0 ± 1.2

15.0 ± 0.8^a

14.0 ± 0.7^b

14.0 ± 0.6^b

15.0 ± 0.9^a

16.0 ± 0.5

50

25

50

10

25

Shigella boydii D 13629

15.0 ± 0.5

15.5 ± 0.8^a

14.5 ± 0.9^a

16.5 ± 0.4^a

15.5 ± 0.6^a

20.0 ± 0.7

50

50

50

10

50

S. dysentery 8

14.5 ± 0.8

14.0 ± 0.7^a

13.5 ± 0.9^b

15.5 ± 0.6^b

13.5 ± 0.4^b

20.0 ± 0.8

50

25

50

10

50

S. flexneri Type 6

15.0 ± 0.7

15.5 ± 0.5^a

15.5 ± 0.6^a

15.5 ± 0.5^a

15.5 ± 0.7^a

20.5 ± 0.7

50

50

50

10

50

S. soneii 1

15.0 ± 0.5

15.5 ± 0.9^a

15.5 ± 0.8^a

15.5 ± 0.5^a

15.5 ± 0.6^a

19.5 ± 1.2

50

100

50

10

50

Staphylococcus aureus ML 267

14.5 ± 0.9

14.5 ± 1.3^a

14.5 ± 0.5^a

14.5 ± 0.6^a

13.5 ± 0.9^b

18.0 ± 1.4

100

50

100

25

100

Vibrio cholerae NCTC 10732

14.0 ± 0.4

15.5 ± 0.8^b

15.0 ± 1.1^b

14.5 ± 1.0^b

15.5 ± 0.9^b

19.0 ± 0.9

50

25

25

10

25

V. cholerae NCTC 11501

14.5 ± 0.6

15.5 ± 0.4^b

14.0 ± 0.7^a

15.0 ± 0.3^a

15.5 ± 0.7^b

18.5 ± 0.8

50

25

25

10

25

V. cholerae NCTC 4693

13.5 ± 0.8

14.5 ± 0.9^b

15.0 ± 0.8^b

15.0 ± 0.3^b

14.5 ± 0.9^b

17.5 ± 0.5

50

25

25

10

25

V. cholerae NCTC 5596

14.0 ± 0.3

15.0 ± 0.7^b

15.0 ± 0.7^b

15.0 ± 0.5^b

15.0 ± 0.5^b

18.5 ± 0.8

50

25

25

10

25

Fungal strains

Latexⁱⁱ

1ⁱⁱ

2ⁱⁱ

3ⁱⁱ

4ⁱⁱ

Gris.

Latex

1

2

3

4

Aspergillus niger ATCC 6275

9.0 ± 0.7

11.0 ± 1.3^b

12.0 ± 0.9^b

12.5 ± 0.6^b

12.5 ± 0.9^b

15.0 ± 0.9

1500

1000

1000

800

1000

Candida albicans ATCC 10231

10.0 ± 0.9

10.0 ± 0.8^a

14.0 ± 1.2^b

13.5 ± 1.0^b

14.5 ± 0.8^b

16.0 ± 1.3

800

400

400

800

400

Penicillium funiculosum NCTC 287

8.0 ± 0.6

9.5 ± 0.5^a

12.5 ± 0.7^b

12.0 ± 0.4^b

13.5 ± 0.5^b

13.5 ± 1.1

1000

800

800

800

400

P. notatum ATCC 11625

8.0 ± 0.8

10.0 ± 0.7^b

12.5 ± 0.6^b

12.0 ± 0.5^b

12.5 ± 0.4^b

13.5 ± 0.9

1000

800

800

800

400