Table 2

Organisms responsible for skin and soft tissue infections

OrganismAnti-TNF, nDMARD, n
Gram-positive species
Staphylococcus aureus*8411
Coagulase negative staphylococci81
Streptococcus spp.111
Gram-negative species
Pseudomonas aeruginosa201
Proteus mirabilis21
Stenotrophomonas maltophilia10
Escherichia coli10
Klebsiella spp.10
Morganella morganii10
Enterobacter spp.10
No culture information available14024
  • * Staphylococci were reported to be methicillin-resistant species in 24 (29%) of the anti-TNF episodes and four (36%) of the DMARD cases.

  • Reports in which subspecies information was not provided are listed by generic ‘spp.’

  • The species breakdown for soft tissue infections shows that staphylococcus was the most prevalent organism in both groups. Pseudomonas was observed more frequently in the anti-TNF cohort.

  • DMARD, disease-modifying antirheumatic drug; TNF, tumour necrosis factor.