 3. A four-day course of an intravenous IV antibiotic. Patients not already receiving a therapeutic antibiotic will be prescribed cefotaxime 1g six-hourly or ceftriaxone 1g daily, with dose adjusted as appropriate for organ dysfunction. Ciprofloxacin 400mg 12-hourly may be used as an alternative if there is a contraindication to cephalosporins, such as allergy. Patients already receiving an alternative IV antibiotic as clinically indicated will not receive an additional IV antibiotic, but will continue the prescribed antibiotic for the usual duration of therapy. 