Table 1.
SEA production in BHI broth without and with MC added after 3 h of growth
| Straina | SEA level (ng/ml) in BHI broth without MCb |
SEA level (ng/ml) in BHI broth with MCb |
Presence of sea genec |
||||
|---|---|---|---|---|---|---|---|
| 3 h | 6 h | 24 h | 6 h | 24 h | sea1 | sea2 | |
| Mu50 | 750.82 ± 166.87hA | 5,814.90 ± 458.61hC | 10,378.59 ± 1,842.13fD | 2,352.47 ± 547.11abB | 5,228.81 ± 935.77bcC | + | |
| Sa55 | 1,085.12 ± 142.77jA | 3,978.98 ± 207.22gB | 6,141.68 ± 529.34eC | 4,393.32 ± 699.72bB | 7,266.79 ± 1,839.55cdD | + | |
| Sa45 | 849.99 ± 59.16iA | 3,598.47 ± 404.40fB | 5,686.83 ± 416.37eC | 4,255.55 ± 263.70bB | 8,828.13 ± 1,379.18dD | + | |
| Sa17 | 633.03 ± 59.91gA | 3,108.70 ± 185.81eB | 4,671.77 ± 510.84dC | 7,403.17 ± 1,384.53cD | 13,650.30 ± 1,925.65eE | + | |
| Sa21 | 587.75 ± 64.04fgA | 3,544.74 ± 760.97fC | 4,900.44 ± 520.97dD | 1,735.17 ± 651.45aB | 3,649.56 ± 458.05abC | + | |
| Sa53 | 555.92 ± 50.97fA | 2,546.24 ± 209.22dA | 3,108.75 ± 197.63cA | 20,293.28 ± 4,193.16eB | 40,237.73 ± 5,415.26gC | + | |
| Sa43 | 355.27 ± 15.24cdA | 1,227.44 ± 107.09bcA | 2,699.43 ± 257.34cAB | 6,521.26 ± 3,972.53cB | 13,862.77 ± 8,222.78eC | + | |
| Sa48 | 441.98 ± 75.61eA | 1,520.24 ± 719.06cA | 2,863.48 ± 234.81cA | 15,185.01 ± 5,639.82dB | 35,181.77 ± 6,567.39fC | + | |
| Sa41 | 403.57 ± 85.68deA | 1,029.69 ± 83.43bAB | 1,940.13 ± 432.02bC | 1,460.00 ± 293.68aBC | 4,262.42 ± 1,494.25bcD | + | |
| MW2 | 287.33 0 ± 86.33cA | 947.72 ± 100.68bB | 1,470.25 ± 417.41bB | 1,301.72 ± 72.79aB | 3,108.66 ± 857.61abC | + | |
| MRSA252 | 133.40 ± 30.11bA | 340.80 ± 24.05aB | 473.31 ± 112.86aC | 280.90 ± 84.82aB | 535.46 ± 168.71aC | + | |
| Newman | 114.42 ± 16.39bA | 287.56 ± 39.24aC | 421.01 ± 69.18aD | 165.82 ± 9.98aB | 210.57 ± 47.23aB | + | |
| Sa56 | 0.38 ± 0.22aA | 4.01 ± 3.55aAB | 8.35 ± 8.25aAB | 6.52 ± 6.52aAB | 12.36 ± 12.47aB | + | |
| Sa54 | 0.49 ± 0.47aA | 2.50 ± 2.60aA | 4.58 ± 4.69aA | 2.42 ± 2.64aA | 4.39 ± 5.28aA | + | |
| Sa47 | 0.32 ± 0.12aA | 2.00 ± 0.78aA | 5.48 ± 2.37aB | 1.94 ± 0.77aA | 8.15 ± 2.86aC | + | |
| Sa52 | 0.53 ± 0.19aA | 2.42 ± 1.06aB | 2.63 ± 1.15aB | 1.76 ± 0.77aAB | 4.41 ± 2.34aC | + | |
| Sa51 | 0.37 ± 0.04aA | 0.72 ± 0.40aA | 0.98 ± 0.83aA | 0.97 ± 0.40aA | 1.17 ± 0.96aA | + | |
| Sa113 | 0.15 ± 0.08aA | 0.47 ± 0.45aAB | 0.58 ± 0.54aAB | 0.84 ± 0.68aAB | 1.12 ± 0.86aB | + | |
| Sa49 | 0.10 ± 0.05aA | 0.41 ± 0.27aB | 0.51 ± 0.34aBC | 0.40 ± 0.26aB | 0.71 ± 0.04aC | + | |
| Sa44 | 0.17 ± 0.06aA | 0.43 ± 0.09aB | 0.65 ± 0.17aC | 0.38 ± 0.04aB | 0.56 ± 0.04aC | + | |
| Sa46 | 0.09 ± 0.04aA | 0.34 ± 0.28aA | 0.41 ± 0.31aAB | 0.66 ± 0.65aAB | 1.13 ± 1.06aB | + | |
a
The strains are listed according to level of SEA production after 24 h under favorable conditions at 37°C.
b
The amount of SEA was measured using six samples from each time point. SEA values in a column sharing a common lowercase letter or SEA values in a row sharing a common uppercase letter are not statistically different (P > 0.05).
c
Results from conventional PCR analysis of 21 S. aureus strains.