TABLE 1.
Solvent tolerance of 14 Staphylococcus strains
| Straina | Growth withb:
|
|||
|---|---|---|---|---|
| Cyclohexane (log Pow, 3.3) | p-Xylene (log Pow, 3.1) | Toluene (log Pow, 2.6) | Benzene (log Pow, 2.0) | |
| S. aureus strains | ||||
| MSSA 476 | ++ | ++ | ++ | ? |
| RN6390 SigB− | ++ | -- | -- | -- |
| SH1000 SigB+ | ++ | ++ | ++ | ++ |
| MRSA 252 | ++ | ++ | + | + |
| MW2 | ++ | ++ | ++ | + |
| RF122 | ++ | -- | -- | -- |
| 25923 | ++ | ++ | ++ | ++ |
| 213 | ++ | ++ | ++ | ++ |
| S. epidermidis strains | ||||
| RP62A | ++ | ++ | ? | -- |
| SE229 | ++ | ++ | + | -- |
| SE220 | ++ | + | + | -- |
| ATCC 14990 | ++ | ++ | ++ | + |
| ATCC 12228 | ++ | ++ | ++ | -- |
| S. haemolyticus | ++ | ++ | ++ | ++ |
| E. faecalis | ++ | +c | +c | +c |
a
S. haemolyticus and E. faecalis were isolated as part of our oil fly screening, and S. aureus strains 213 and 25923 were obtained from Eugene Martin. All other strains were obtained from Greg Somerville (23).
b
Log Pow is a measure of the intrinsic solvent toxicity depending on the partition ratios of the solvent into E. coli membranes. Growth was scored as follows: ++, confluent growth; +, some growth; −, no growth; ?, variable results. All data were based on at least three independent replicates.
c
E. faecalis did not tolerate 100% p-xylene, toluene, or benzene; the maximum levels tolerated were 50, 35, and 30%, respectively.