whereas 70 urinary tract infections occurred during a mean 8-month followup before treatment only 4 occurred during the mean 12.5-month followup after introduction of post-coital prophylaxis ( none occurred on co-trimoxazole or nalidixic acid therapy and only 1 infection occurred on nitrofurantoin therapy ) .
C0042029
urinary tract
C0028156
nitrofurantoin