In vitro activity of LY127935.

Antimicrobial Agents and Chemotherapy
R J Fass

Abstract

LY127935 is a unique new beta-lactam antibiotic. Its activity against 536 clinical isolates was studied by using microdilution methods of susceptibility testing and compared with the activities of cefamandole, cefoxitin, and cephalothin. The lowest concentrations required to inhibit at least 90% of strains tested (MIC(90)s) of LY127935 for Staphylococcus aureus, Streptococcus pyogenes, Streptococcus agalactiae, and Streptococcus pneumoniae ranged from 2 to 8 mug/ml. The MIC(90)s for other staphylococci and streptococci were higher. The MIC(90)s for Enterobacteriaceae and Pseudomonas species ranged from 0.12 to 8 mug/ml and 8 to >32 mug/ml, respectively. The MIC(90)s for anaerobes ranged from 2 to >32 mug/ml. As determined by MIC(90)s, LY127935 was consistently the least active antibiotic against facultatively anaerobic gram-positive cocci and the most active against aerobic and facultatively anaerobic gram-negative bacilli. Its position with respect to activity against anaerobes varied from being the most active against Bacteroides fragilis and Clostridium perfringens to the least active against anaerobic cocci. In a population of multidrug-resistant isolates, concentrations of 8 mug or less of LY127935 per ml inhibited 82% of ...Continue Reading

References

Jun 1, 1976·Antimicrobial Agents and Chemotherapy·C M Findell, J C Sherris

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Citations

Aug 1, 1985·Antimicrobial Agents and Chemotherapy·T E JonesL N Sansom
Mar 1, 1985·Antimicrobial Agents and Chemotherapy·G B Hill, O M Ayers
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