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  • Title: Antimicrobial activity of ceftaroline tested against drug-resistant subsets of Streptococcus pneumoniae from U.S. medical centers.
    Author: Flamm RK, Sader HS, Farrell DJ, Jones RN.
    Journal: Antimicrob Agents Chemother; 2014; 58(4):2468-71. PubMed ID: 24514082.
    Abstract:
    Streptococcus pneumoniae isolates (6,958) were collected from patients at 163 U.S. medical centers during 2009 through 2012. Isolates were evaluated for multidrug resistance (MDR) to penicillin, ceftriaxone, erythromycin, tetracycline, trimethoprim-sulfamethoxazole, and levofloxacin. Ceftaroline was 16-fold more potent than ceftriaxone (MIC50/MIC90, ≤0.25/2 μg/ml) against all isolates. For MDR isolates (35.2% of tested strains), ceftaroline (MIC50/MIC90, 0.06/0.25 μg/ml; 100.0% susceptible) was the most active agent tested, being 8-fold more potent than ceftriaxone (MIC50/MIC90, 0.5/2 μg/ml) and 16-fold more potent than penicillin (MIC50/MIC90, 1/4 μg/ml).
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