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  • Title: Activity of gatifloxacin compared to those of seven agents against bacteria recovered from outpatients with respiratory tract infection.
    Author: Smayevsky J, Lopez H, Di Chiara M, Scarano S, Lanza A, Vilches V, Stepanik D, Bantar C, Sucari A.
    Journal: Diagn Microbiol Infect Dis; 2000 Aug; 37(4):261-4. PubMed ID: 10974577.
    Abstract:
    The in vitro activity of gatifloxacin and levofloxacin, ciprofloxacin, penicillin, ampicillin, ampicillin-sulbactam, ceftriaxone and clarithromycin was evaluated against 173 S. pneumoniae strains (128, penicillin-susceptible strains; 32, intermediate penicillin- resistant strains and 13, penicillin-resistant strains), 163 H. influenzae strains (128, beta-lactamase non-producer; 35, beta-lactamase producers), 111 M. catarrhalis (9, beta-lactamase non-producer; 102, beta-lactamase producers), 95 Streptococcus pyogenes and 116 S. aureus strains (96, methicillin-susceptible; 20, methicillin-resistant) recovered from outpatients with respiratory tract infection. Based upon the MICs at which 50% and 90% of the isolates were inhibited we concluded that gatifloxacin proved to be the most active antibiotic against respiratory pathogens, including all the penicillin-resistant pneumococci and H. influenzae or M. catarrhalis producing beta-lactamase. Furthermore, their MICs against S. pneumoniae and methicillin-resistant S. aureus were lower than those of levofloxacin and ciprofloxacin.Therefore, this new fluoroquinolone displayed in vitro features that make it suitable for treating community-acquired respiratory tract infections.
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