TABLE 2.
Resistance of representative copper coin isolates to dry or moist copper surfaces and ionic copper
| Type or control strain or coin isolatea | Survival time on: |
MIC (mM CuCl2) | |
|---|---|---|---|
| Dry copper surfaces | Moist copper surfaces | ||
| Escherichia coli W3110b | >30 s | >1 h | 3.5 |
| Pantoea stewartii DSM 30176 | >30 s | >48 h | 1.5 |
| P. stewartii L10 | >24 h | >1 h | 4.5 |
| Acinetobacter johnsonii DSM 6963 | >1 min | >1 h | 2.5 |
| A. johnsonii L18 | >24 h | >1 h | 3.0 |
| Pseudomonas oleovorans DSM 1045 | >30 s | >1 h | 2.5 |
| P. oleovorans L19 | >48 h | >24 h | 3.5 |
| Sphingomonas panni DSM 15761 | >48 h | >48 h | 2.0 |
| S. panni R65P | >48 h | >1 h | 0.75 |
| Staphylococcus haemolyticus DSM 20263 | >1 h | >3 h | 3.5 |
| S. haemolyticus L70 | >48 h | >3 h | 2.0 |
| Staphylococcus epidermidis DSM 20044 | >1 h | >1 h | 1.0 |
| S. epidermidis L77 | >24 h | >24 h | 1.5 |
| Staphylococcus warnerii DSM 20316 | >1 min | >1 h | 2.5 |
| S. warnerii L47 | >48 h | >24 h | 2.0 |
| Brachybacterium conglomeratum DSM 10241 | >10 min | >1 h | 0.5 |
| B. conglomeratum N96 | >7 days | >1 h | 0.5 |
| Micrococcus luteus DSM 20030 | >3 h | >24 h | 2.0 |
| M. luteus L51 | >48 h | >3 h | 1.5 |
| Kocuria marina JCM 13363 | >48 h | >1 h | 2.0 |
| K. marina L73 | >24 h | >24 h | 2.0 |
| K. palustris R40 | >48 h | >1 h | 0.75 |
a
In each group, the first strain is a type or control strain and the second and/or third strain is a coin isolate.
b
Lab strain of E. coli, included as an example of a copper-sensitive bacterium.