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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.