Table 2.
Characteristics | Value |
|||||
---|---|---|---|---|---|---|
Moderately increasing MRSA (1998–2001) |
Rapidly increasing MRSA (2002–2005) |
Moderately decreasing MRSA (2006–2009) |
||||
No. of infections | % MRSA | No. of infections | % MRSA | No. of infections | % MRSA | |
Clinical syndromesb | ||||||
Necrotizing fasciitis/toxic shock | 37 | 27 | 78 | 37 | 103 | 49 |
Deep organ abscess | 317 | 28 | 607 | 51 | 796 | 48 |
Skin and soft tissue infection | 15,718 | 13 | 30,775 | 42 | 66,382 | 48 |
Pneumonia or lung related | 2,023 | 33 | 3,169 | 51 | 3,003 | 50 |
Joint or bone infection | 1,947 | 14 | 2,668 | 30 | 3,496 | 34 |
Urinary tract infection | 2,548 | 30 | 4,094 | 49 | 4,561 | 48 |
Ear, nose, throat infections | 1,695 | 5 | 1,929 | 18 | 2,884 | 25 |
Shock | 307 | 34 | 794 | 51 | 982 | 50 |
Fever | 749 | 18 | 1,252 | 34 | 1,332 | 35 |
Other selected syndromesc | 446 | 27 | 626 | 45 | 687 | 42 |
Age (yr) | ||||||
Under 5 | 1,251 | 5 | 2,014 | 32 | 5,461 | 46 |
5 to <18 | 2,108 | 5 | 4,088 | 34 | 10,980 | 41 |
18 to <50 | 6,584 | 8 | 13,406 | 44 | 28,526 | 50 |
50 to <65 | 4,824 | 13 | 7,958 | 37 | 14,847 | 44 |
65+ | 6,475 | 26 | 10,409 | 44 | 14,519 | 45 |
Race/ethnicity | ||||||
Asian | 1,645 | 10 | 2,982 | 29 | 6,204 | 35 |
African-American | 1,852 | 19 | 3,639 | 54 | 7,210 | 60 |
Hispanic | 2,602 | 12 | 5,137 | 41 | 11,912 | 48 |
Other or unknown race | 2,803 | 10 | 5,799 | 43 | 12,268 | 48 |
White | 12,340 | 15 | 20,318 | 40 | 36,739 | 45 |
Onset type | ||||||
Health care associated, hospital onset | 2,152 | 41 | 3,469 | 58 | 3,159 | 56 |
Health care associated, community onset | 7,395 | 20 | 11,098 | 40 | 16,312 | 45 |
Community associated | 11,695 | 6 | 23,308 | 39 | 54,862 | 46 |
Infections were defined as the first positive S. aureus isolate per patient per 365-day period and patients who were diagnosed with a potentially S. aureus-related clinical syndrome from 7 days before to 7 days after the index date. Only isolates from blood, bone, CSF, body fluid, urine, tissue, respiratory, and other miscellaneous bacterial specimens (such as those taken from abscesses, pustules, boils, and wounds) were included.
Clinical syndromes were based on ICD9 codes received by the patient from 7 days before to 7 days after the S. aureus specimen was obtained. Patients could have more than one clinical syndrome, and thus, the numbers add up to more than the total number of infections.
Includes meningitis, intracranial abscess, tracheostomy infection, esophagostomy infection, gastrostomy infection, nonhealing surgical wounds, acute pericarditis, acute endocarditis, acute myocarditis, other diseases of the pericardium, arterial embolism, and thrombosis.