TABLE 2.
Laboratory Values and Diagnosis Category by Pathogen
| Pathogen | Staphylococcus aureus | Streptococcus pyogenes | Kingella kingae | Escherichia coli | Streptococcus pneumoniae | Others* | Total |
|---|---|---|---|---|---|---|---|
| Number positive (% of positives) | 42 (49%) | 20 (24%) | 6 (7%) | 4 (5%) | 4 (5%) | 7 (10%) | 83/102 (81%) |
| Patient age (years), median [IQR] | 11.1 [6.8–13.5] | 6 [3–8.9] | 1 [0.9–1.5] | 15.2 [14–16.6] | 6.3 [0.9–13] | 6.7 [4.9–14] | 7.9 [3.9–12.6] |
| Diagnosis category Pyomyositis (% of positives) |
19 (43%) |
13 (30%) |
3 (7%) |
3 (7%) |
1 (2%) |
5 (11%) |
44/61 (72%) |
| Bacterial myositis (% of positives) | 10 (66%) | 3 (20%) | 1 (7%) | 1 (7%) | 0 | 0 | 15/15 (100%)† |
| Associated pyomyositis (% of positives) | 12 (52%) | 4 (17%) | 2 (9%) | 0 | 3 (13%) | 2 (9%) | 23/26 (88%) |
| Median of maximal WBC value (×109/L) [IQR] | 13 [10–19] | 18 [15–22] | 11 [10–14] | 13 [5–20] | 19 [17–22] | 15 [9–18] | 16 [11–20] |
| Median of maximal CRP (mg/L) [IQR] | 142 [84–185] | 164 [104–241] | 64 [54–74] | 167 [119–209] | 254 [189–319] | 56 [49–70] | 131 [71–191] |
| Median of maximal ESR value (mm/h) [IQR] | 60 [35–88] | 50 [25–89] | 64 [46–73] | 40 [30–40] | 72 [63–79] | 58 [49–63] | 58 [35–85] |
*
Staphylococcus lugdunensis (n = 1); Enterobacter spp. (n = 1); Group C streptococcus (n = 1); Candida parapsilosis and Enterococcus spp. (n = 1); Streptococcus agalactiae (n = 1); Salmonella Group D (n = 1); polymicrobial infection (self-contaminated peripherally inserted central catheter line; n = 1).
†
Positive culture was a condition for case definition of bacterial myositis.