Am from Ethiopia, Gondar university hospital.
Here, we usually treat our patients with 3rd generation cephalosporines for 3-4 weeks.
We incise and drain abscesses and remove pus. Septic arthritis is surely an abscess in a joint and pus must be drained.
The exception is TB where I feel antibiotics alone can be effective if given early.
Too many joints are destroyed because pus is not drained in time. This gives lifelong morbidity.