The worldwide increase in the resistance of micro-organisms to antimicrobial drugs leads to an increase in morbidity, mortality and health care costs. It is important to identify the resistant organisms, to provide alternative antibiotic treatment protocols and to identify the high-risk infection areas.

We undertook a retrospective study of 693 musculoskeletal infections seen in the Musculoskeletal Tumour and Sepsis Unit of Pretoria Academic Hospital over five years, capturing data relating to the microscopy, culture and sensitivity to antimicrobial drugs of micro-organisms from tissue samples and pus swabs.

Most infections developed in patients aged 31 to 40 years. Sepsis most often occurred postoperatively. The next most common sepsis followed trauma. The femur was the most common site, followed by the tibia and the knee. In descending order, the most common organisms isolated were Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas sp., Escherichia coli, Enterobacter sp.

In the last two years there was an alarming increase in coagulase-negative staphylococci. All micro-organisms exhibited increased resistance to specific antimicrobial drugs over the five-year period.