TABLE 4

Microbiologic Findings in Patients With Arthritis by Diagnostic Group

VariableJIA (n = 36)Infectious (n = 12)Postinfectious (n = 24)Transient Except HSP (n = 95)HSP (n = 14)
Total microbiologic findings, n (%)7 (19)8 (75)24 (100)7 (7)4 (29)
Bacteria in synovial fluid, na06000
Blood culture positive, nb02120
GAS, throat smear, n01903
Positive stool culture, nc00200
Rotavirus in stool, n01101
Urinary tract infection, nd00010
ASO or anti-DNase B ≥600, n511701
Borrelia IgM and IgG positive, n00310
Other serology, ne21231
  • GAS indicates group A streptococci; HSP, Henoch-Schönlein purpura; ASO, antistreptolysin-O; anti-DNase B, anti-deoxyribonuclease B.

  • For positive tests within 6 weeks after inclusion, 4 patients tested positive for >1 bacteria or virus.

  • a Data include Staphylococcus aureus (n = 1), Kingella kingae (n = 1), β-hemolytic streptococci group A (n = 1), β-hemolytic streptococci group B (n = 1), Streptococcus pneumonia (n = 1), and Gram-positive cocci by microscopy (n = 1).

  • b Data include S aureus (n = 2), β-hemolytic streptococci group A (n = 2), and β-hemolytic streptococci group B (n = 1).

  • c Data include Shigella flexneri (n = 1) and Campylobacter species (n = 1).

  • d Escherichia coli (n = 1).

  • e Cytomegalovirus IgM (n = 4), Epstein-Barr virus IgM (n = 2), mycoplasma IgM (n = 1), and varicella IgM (n = 1). None of the patients were Yersinia, hepatitis B, or parvovirus B19 positive.