Journal of Antimicrobial Chemotherapy (1987) 20, 513-517
© 1987 The British Society for Antimicrobial Chemotherapy
research-article |
LY146032: activity and resistance development in vitro
Department of Medical Microbiology, University Hospital Leiden P.O. Box 9600, 2300 RC Leiden, The Netherlands
accepted 27 April 1987
LY 146032, a new lipopeptide antibiotic, was compared with vancomycin, teicoplanin, cefamandole and ciprofloxacin, against 107 clinical isolates comprising methicillin-susceptible and methicillin-resistant Staphylococcus spp., Streptococcus faecalis and Corynebacterium spp. All staphylococci were susceptible to all agents, except that some of the methicillin-resistant strains were resistant to cefamandole. Only LY 146032 and ciprofloxacin were bactericidal to Str. faecalis. Development of resistance was studied by serial transfers of ten selected strains. A stable
eightfold increase of the MIC over the breakpoint was found to develop to a variable extent against all agents tested. Simultaneous development of resistance to any of the other antibiotics was registered in 11/200 tests.
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