Volume 15, Number 10—October 2009
CME ACTIVITY
Community-Associated Methicillin-Resistant Staphylococcus aureus, Iowa, USA
Philip Van De Griend, Loreen A. Herwaldt
, Bret Alvis, Mary DeMartino, Kristopher Heilmann, Gary Doern, Patricia Winokur, Diana DeSalvo Vonstein, and Daniel Diekema
, Bret Alvis, Mary DeMartino, Kristopher Heilmann, Gary Doern, Patricia Winokur, Diana DeSalvo Vonstein, and Daniel DiekemaTable 1
Descriptive epidemiology of invasive MRSA in Iowa, USA, 1999–2005*
| Characteristic† | Total no. (%), N = 1,323 | USA type |
p value | |
|---|---|---|---|---|
| No. (%) USA300/400, n = 26 | No. (%) other,‡ n = 1,297 | |||
| Mean age, y | 67.8 (SD = 17.6) | 46.0 (SD = 22.0) | 68.2 (SD = 17.2) | <0.0001 |
| Female gender | 550 (41.6) | 9 (34.6) | 541 (42.7) | 0.549 |
| Inpatient stay | 1,124 (85.0) | 24 (92.3) | 1,100 (84.8) | 1.000 |
| ICU admission | 221 (16.7) | 4 (15.4) | 217 (16.7) | 0.764 |
| Nosocomial infection |
346 (26.2) |
5 (19.2) |
341 (26.3) |
0.306 |
| Specimen type | <0.0001 | |||
| Blood | 1,256 (94.9) | 25 (96.2) | 1,231 (94.9) | |
| CSF | 9 (0.7) | 0 | 9 (0.7) | |
| Joint fluid | 33 (2.5) | 1 (3.9) | 32 (2.5) | |
| Pleural fluid | 8 (0.6) | 0 | 8 (0.6) | |
| Other |
6 (0.5) |
0 (0.0) |
6 (0.5) |
|
| Iowa region | 0.054 | |||
| 1 | 32 (2.4) | 1 (3.9) | 31 (2.4) | |
| 2 | 370 (28.0) | 10 (38.5) | 360 (27.8) | |
| 3 | 335 (25.3) | 2 (7.7) | 333 (25.7) | |
| 4 | 272 (20.6) | 4 (15.4) | 268 (20.7) | |
| 5 | 140 (10.6) | 5 (19.2) | 135 (10.4) | |
| 6 |
63 (4.8) |
4 (15.4) |
59 (4.5) |
|
| PVL |
ND |
ND |
ND |
ND |
| SCCmec IV | ND | ND | ND | ND |
*MRSA, methicillin-resistant Staphylococcus aureus; ICU, intensive care unit; CSF, cerebrospinal fluid; PVL, Panton-Valentine leukocidin; SCCmec IV, staphylococcal chromosomal cassette mec type IV; ND, not done for all isolates.
†The number of patients missing data on specific variables: age = 13; gender = 11; inpatient = 85; ICU = 356; nosocomial = 358; specimen type = 11; Iowa Department of Public Health Reporting Region = 11.
‡Of the subset of isolates that were typed (N = 180), 173 (96%) were USA100. The remainder clustered with USA200 (3), USA500 (2), or did not match an existing USA type.
