Journal
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
Volume 55, Issue 5, Pages 2469-2471Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/AAC.01380-10
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Among 1,349 Streptococcus pneumoniae invasive isolates, 45 (3.3%) were levofloxacin resistant. Serotype distribution was as follows: 8 (n = 32 isolates), 19A (n = 4 isolates), 7F (n = 3 isolates), 9V (n = 2 isolates), 10A (n = 1 isolate), 19F (n = 1 isolate), 6B (n = 1 isolate), and nontypeable (n = 1 isolate). Levofloxacin-resistant isolates had dual mutations in the gyrA and parC genes. Serotype 8 strains corresponded to a capsular switching of the Sweden(15A)-25 clone. Levofloxacin resistance was also detected among multiresistant (ST276(19A), Spain(9V)-ST156, ST88(19F), and ST1542(6B)) and among usually antibiotic-susceptible (Netherlands(7F)-ST191, ST1201(19A), and ST2639(10A)) clones.
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