Piperacillin in the Treatment of Urinary Tract Infections

Abstract
The ureidopenicillin piperacillin was given to 20 patients with urinary tract infections. The infecting microbes all had a minimum inhibitory concentration below 0.6 μg/ml. One strain of Staphylococcus aureus produced β-lactamase. All patients were freed of their microbes at the end of 7 days therapy. 1-2 weeks after the end of therapy, 1 relapsed and 3 had superinfections. Among the 16 who were without bacteria or leucocyturia after 1-2 weeks, 2 exhibited a superinfection 4-6 weeks after the end of therapy.

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