Table 3

Iatrogenic NJI in adults in Iceland 2003–2017

ArthrocentesisArthroscopyOpen joint surgeryTotal
No of cases19581188
Age (years, median)69546357
Time from procedure to diagnosis (days, median)10135213
Male/female ratio1.42.62.72.3
Infected joint
 Knee11/19 (58)52/58 (90)8/11 (73)71/88 (81)
 Shoulder3/19 (16)4/58 (7)1/11 (9)8/88 (9)
 Other*5/19 (26)2/58 (3)2/11 (18)9/88 (10)
Synovial culture
Staphylococcus aureus 11/19 (58)23/58 (40)4/11 (36)38/88 (43)
 CNS4/19 (21)23/58 (40)6/11 (55)33/88 (38)
 Streptococci†3/19 (16)5/58 (9)1/11 (9)9/88 (10)
 Other‡‡1/19 (5)7/58 (12)08/88 (9)
  • Data are no/no (%). Median values for age and time from procedure to diagnosis are shown.

  • *Acromioclavicular, ankle, hip, proximal interphalangeal and wrist joint.

  • †Streptococcus, viridans group: 3, Streptococci group C or G: 4, Streptococcus mitis: 1, Streptococcus pneumoniae: 1.

  • Enterobacter cloacae, gram positive rods, Klebsiella oxytoca, Lactococcus cremoris, Micrococcus species.

  • CNS, coagulase-negative staphylococci; NJI, native joint infection.