Table 3 Antimicrobial activity of M. luteus carotenoids against pathogenic bacteria on NA at 30 °C for 24 h
| Â | Carotenoid (IZD) mm | |||||
|---|---|---|---|---|---|---|
Gram-positive bacteria | Gram-negative bacteria | |||||
Conc. (µg/ml) | B. cereus | S. aureus | E. faecalis | S. typhi | E. coli | S. sonnei |
1000 | 29.0e ± 0.15 | 14.0ij ± 0.06 | 37.0c ± 0.08 | 28.0e ± 0.43 | 17.0 h ± 0.18 | 20.0 g ± 0.26 |
500 | 26.0f ± 0.08 | 0.00 | 33.0d ± 0.17 | 0.00 | 15.0i ± 0.16 | 18.0 h ± 0.25 |
250 | 21.0 g ± 0.25 | 0.00 | 28.0e ± 0.20 | 0.00 | 13.0j ± 0.59 | 15.0i ± 0.21 |
125 | 17.0 h ± 0.30 | 0.00 | 0.00 | 0.00 | 0 .00 | 0.00 |
75 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
Tetracycline (1000 µg/ml) | 35.0d ± 0.38 | 45.0a ± 0.27 | 40.0b ± 0.26 | 45.0a ± 0.30 | 38.0c ± 0.41 | 40.0b ± 0.34 |
AI | 0.82 | 0.31 | 0.92 | 0.621 | 0.44 | 0.50 |