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Table 1 Demographic and clinical features of the study patients

From: Broad-range PCR, cloning and sequencing of the full 16S rRNA gene for detection of bacterial DNA in synovial fluid samples of Tunisian patients with reactive and undifferentiated arthritis

Diagnosis (patients; n = 27) Median disease duration, months (range) Actual age or median age, years (range) Sex ratio (M/F) Clinical details
ReA (n = 5) 2.4 (1 to 6) 32.4 (20 to 50) 4:1  
   1   22 M Sexually acquired ReA; Ct IgG positivea, Ct IgA positive serologyb
   2   40 F Sexually acquired ReA;
   3   20 M Sexually acquired ReA; Ct IgG positive serologya; Ct IgA positive serologyb; B27+d
   4   50 M Sexually acquired ReA; Ct IgA positive serologyb; Ct positive PCRc; B27+d
   5   30 M Sexually acquired ReA
UA (n = 9) 25 (2 to 60) 40 (22 to 59) 5:4 -
RA (n = 7) 66 (12 to 228) 44 (39 to 53) 2:5 -
OA (n = 6) 14 (12 to 24) 58 (44 to 70) 5:1 -
  1. a Serology was determined for Ct-IgG antibodies by Micro Immunofluorescence assay as described by Wang and Grayston [29]. bSerology was determined for Ct-IgA antibodies by ELISA (Labsystems, Hilsinki, Finland). cChlamydia PCR in genital swabs was determined by Cobas Amplicor PCR assay (Roche Diagnostics Molecular Systems, Inc, CA, USA). dHLA-B27 positivity was determined using a microcytotoxicity assay.
  2. Ct = Chlamydia trachomatis; RA = rheumatoid arthritis; ReA = reactive arthritis; OA = osteoarthritis; UA = undifferentiated arthritis.