Single-dose regimen of cefonicid for the treatment of uncomplicated infections of the lower urinary tract.

Fifty-three women with symptoms of lower urinary tract infection were randomly assigned to treatment with cefonicid administered intramuscularly in a single 1-g dose or to treatment with 500 mg of amoxicillin administered orally three times a day for five to seven days. Urine cultures were obtained before therapy and again at five to 18 days and six to seven weeks after termination of therapy. Forty-one patients had greater than or equal to 2 X 10(4) colony-forming units (cfu)/ml of catheterized urine or greater than or equal to 10(5) cfu/ml of midstream urine. In the cefonicid-treated group, 19 (90%) of 21 patients demonstrated bacteriologic cure at early follow-up. Of the 18 patients seen at late follow-up, 15 were cured and three were reinfected. One patient was lost to late follow-up. In the amoxicillin-treated group, 16 (80%) of 20 patients demonstrated bacteriologic cure at early follow-up. Of the 15 patients available at late follow-up, 14 were cured and one was reinfected. One patient was lost to late follow-up. Cefonicid is an effective single-dose agent in uncomplicated lower urinary tract infection.