In Vitro Activities of Ketolides HRM 3647 and HRM 3004, Levofloxacin, and Other Quinolones and Macrolides against Neisseria spp. and Moraxella catarrhalis

In vitro activities of the ketolides HMR 3647 [corrected] and HMR 3004 [corrected] against pathogenic Neisseria gonorrhoeae and N. meningitidis, saprophytic Neisseria isolates, and Moraxella catarrhalis were determined. The comparison of ketolide activities with those of the other macrolides shows a much better activity in the majority of species, with macrolide MICs at which 90% of the isolates are inhibited between 8- and 10-fold higher.