TABLE 2.
Distribution of S. aureus strains associated with BSI according to the annual 3-month survey and the antibiogroup
| Antibiogroup | No. (%) of strains, according to annual 3-month survey period, ina:
|
||||||
|---|---|---|---|---|---|---|---|
| 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | |
| MRSA | 33 (27) | 35 (30) | 43 (35) | 23 (29) | 46 (29) | 40 (30) | 44 (28) |
| CMRSA | 28 (85) | 31 (89) | 33 (77) | 18 (78) | 27 (59) | 29 (72) | 22 (50) |
| NORSA | 5 (15) | 4 (11) | 10 (23) | 5 (22) | 19 (41) | 11 (28) | 22 (50) |
| NORSA FQb | 1 | 4 | 7 | 4 | 16 | 9 | 16 |
| Other NORSA | 4 | 3 | 1 | 3 | 2 | 6 | |
| FQ resistance | 31 (94) | 35 (100) | 43 (100) | 23 (100) | 46 (100) | 38 (97) | 38 (89) |
| MSSA | 89 (73) | 83 (70) | 79 (65) | 56 (71) | 111 (71) | 93 (70) | 115 (72) |
| EMSSAc | 9 | 15 | 6 | 3 | 11 | 8 | 8 |
| EMSSA FQd | 4 | 7 | 6 | ||||
| FQ resistance | 6 (7) | 14 (17) | 8 (8) | 4 (7) | 9 (8) | 7 (8) | 5 (4) |
| Total | 122 | 118 | 122 | 79 | 157 | 133 | 159 |
a
Results obtained before 2007 were described previously (26, 27) and are reported to show the changes through time affecting the different groups of strains. Percentages indicate the proportions of S. aureus strains that are of the indicated antibiogroup.
b
NORSA strains resistant only to FQs.
c
EMSSA, MSSA strains with resistance to FQs or at least two antibiotics.
d
EMSSA FQ, MSSA strains with resistance to FQs only.