Abstract
The activities of six peptide deformylase (PDF) inhibitors against 107 respiratory tract pathogens were studied and compared to those of ciprofloxacin and amoxicillin-clavulanate. Against Streptococcus pneumoniae, BB-83698 and BB-83815 were the most active PDF inhibitors (MIC at which 90% of the organisms tested were inhibited [MIC(90)], 0.25 microg/ml). Five of the agents showed similar activity against Moraxella catarrhalis (MIC(90), 0.12 microg/ml). All PDF inhibitors were less active against Haemophilus influenzae; BB-3497 was the most active agent (MIC(90), 2 microg/ml). Five agents were studied against Chlamydia spp. and showed activity similar to that of ciprofloxacin (MIC, 0.5 to 4 microg/ml). This study demonstrates that PDF inhibitors have the potential to be developed for the treatment of respiratory tract infections.
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