Appropriate Tests


Blood culture, MCS pus (collected at intra-operative drainage procedure or by aspiration), Wound swab microscopy and culture if contiguous skin lesion present, Bone biopsy.

Full blood count, Blood film, White cell count differential; C-Reactive protein.

Bacterial infection


Staphylococcus aureus
Coagulase negative staph and skin organisms (prosthetic infections)


Gram-negative bacilli




  • Haemophilus influenzae

In children: see Haemophilus influenzae infection.

  • Escherichia coli


  • Pseudomonas aeruginosa


  • Salmonella sp




  • Bacteroides fragilis


Mycobacterium tuberculosis

Pus, Bone biopsy (including Fine needle aspiration biopsy) , Mycobacteria testing.

See also Tuberculosis.