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Table 1 Characteristics of patients

From: Use of HLA-B27 tetramers to identify low-frequency antigen-specific T cells in Chlamydia-triggered reactive arthritis

Patient no.

B27

Disease

Sex

Age (years)

Disease duration

Chlamydia in urine (PCR)

Synovial T cell proliferation

Antibodies

1

+

ReA

Male

18

5 months

+

Chlamydia trachomatis

n.d.

2

+

ReA

Male

20

2 months

+

Chlamydia trachomatis

n.d.

3

+

ReA

Male

32

5 months

+

Chlamydia trachomatis

+

4

+

ReA

Male

34

3 months

+

Chlamydia trachomatis

n.d.

5

+

ReA

Male

20

1 month

+

n.d.

+

6

+

ReA

Male

26

1 month

+

Chlamydia trachomatis

+

7

-

ReA

Male

56

1 month

+

Chlamydia trachomatis

n.d.

8

-

ReA

Male

43

3 months

+

Chlamydia trachomatis

n.d.

9

-

ReA

Female

32

6 months

+

Chlamydia trachomatis

n.d.

10

+

Chronic ReA

Male

20

7 years

-

Enterobacteria

n.d.

11

+

ReA

Male

47

3 weeks

-

Enterobacteria

n.d.

12

+

ReA

Female

49

6 months

-

Enterobacteria

n.d.

13

n.d.

RA

Female

67

10 years

n.d.

n.d.

n.d.

14

n.d.

RA

Female

49

>1 year

n.d.

n.d.

n.d.

15

n.d.

RA

Female

62

14 years

n.d.

n.d.

n.d.

  1. n.d., not done; PCR, polymerase chain reaction; RA, rheumatoid arthritis; ReA, reactive arthritis.