Peptide deformylase inhibitor LBM-415 and seven other drugs were tested against Mycoplasma pneumoniae (100 isolates), Mycoplasma hominis (20 isolates), Mycoplasma fermentons (10 isolates), and Ureaplasma species (50 isolates). LBM-415 was active against M. pneumoniae (MICs, ≤0.008 μg/ml). It snowed no activity against M. hominis and M. fermentans and modest activity against Ureaplasma spp. Copyright © 2005, American Society for Microbiology. All Rights Reserved.