|Clinical characteristics of the twenty-three patients with Lyme arthritis and of four healthy control subjects*|
|N = 8**||N = 15**|
|Age, years||44 (17-53)||29 (12-78)||0.2|
|Duration of arthritis (months)|
|Before treatment||0.1 (0.1-1)||1 (0.1-6)||0.06|
|From start of antibiotics to sample date||0 (0-3)||4 (0-18)||0.001|
|From start of antibiotics to resolution of arthritis||3 (1.5-3)||10 (4-20)||0.0001|
|Serum findings on the sample date|
|Positive serologic result for B. burgdorferi|
|antibodies by ELISA and Western blotting||8||15||1.0|
|Joint fluid findings on the sample date|
|Total white cell count/mm3||25,750||12,150||0.01|
|% polymorphonuclear leukocytes||79 (28-91)||88 (16-98)||0.35|
|Total mononuclear cells/mm3||1,600||1,500||0.69|
|No. PCR+/PCR- for B. burgdorferi DNA||8/0||5/10||0.002|
*The four healthy control subjects had a median age of 36 (range, 28 to 42; three were women and one was a man. None had a positive serologic test result for B. burgdorferi antibodies.
**All values are given as median (range) unless otherwise noted. ELISA, enzyme-linked immunosorbent assay.
Katchar et al.
Katchar et al. Arthritis Research & Therapy 2013 15:R183 doi:10.1186/ar4373