1) Minimal inhibitory concentration of Cefsulodin (SCE-129, CFS) were determined by plate dilution method on 136 strains isolated from urinary tract infections. At 10
8 cells/ml inoculum size, 6 strains of
Staphylococcus aureus were inhibited at concentrations between 3.12 and 6.25μg/ml. Sixteen of 23 strains of
Pseudomonas aeruginosa were inhibited at concentrations between 1.56-12.5μg/ml, and other 7 strains were resistant to 50μg/ml or more. Most strains of
E. coli, Proteus mirabilis, Proteus vulgaris, Klebsiella and
Serratia were resistant to 25μg/ml or more.
2) In cross sensitivity with inoculum size of 10
8 cells/ml, CFS was effective against some strains of
Pseudomonas aeruginosa which were resistant to Gentamicin and Dibekacin. There were no strains which were resistant to Ainikacin and sensitive to CFS.
3) The peak serum level in a normal adult to whom 500 mg of CFS was given by intravenous drip infusion for one hour, was 12.0μg/ml at one hour, and the urinary recovery rate was 87.8% within 6 hours. The serum level in the other normal adult reached to the maximum (3.3μg/ml) at 30 minutes after intramuscular administration of CFS 125 mg, and the urinary recovery rate was 62.5% within 6 hours.
4) CFS levels in prostatic tissues were determined with extirpated prostatic tissues of 4 prostatic hypertrophy patients and one prostatic cancer patient, administered 500 mg of CFS intravenously at the time of operation. Serum levels of CFS in these patients were also determined at the same time. The mean CFS level in prostatic tissues was 6.8μg/ml which was equal to 58.2% of the serum level at 30 minutes, and 5.6μg/ml, 40.2% of the serum level at 50 minutes after administration of CFS.
5) Seventeen cases with chronic complicated urinary tract infections were treated with 500 mg or 1, 000 mg of CFS per day for 5 to 9 days. Excellent or good effect was obtained in 10 out of 14 cases. Three cases dropped out. There were 10 cases whose isolated organism was
Pseudomonas only. The clinical results of these cases were consistent of excellent in 2 cases, good in 7 and poor in 1. The number of
Pseudomonas isolated before administration of CFS were 12, and 9 of them were eradicated.
6) Side effects were not observed in this series.
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