[Basic and clinical studies on ceftriaxone in perinatal infections].

Basic and clinical investigations were conducted on ceftriaxone (CTRX), a cephem antibiotic with a wide antibacterial spectrum and with especially high activity against Gram-negative bacteria. The results obtained are summarized as follows: 1. CTRX, following intravenous drip infusion of 1 g, had a serum half-life of 5.8 hours, which is longer than that of any other existing cephem antibiotics. 2. The level of CTRX in the umbilical cord serum 6 hours after intravenous drip infusion of 1 g was at a satisfactory level, 15 micrograms/ml. 3. The CTRX was remarkably effective or effective in 9 cases, and the activity was high even in cases where penicillin or other third-generation cephems were ineffective. These results seem to indicate that CTRX may be effective in perinatal and intrauterine fetal infections.