Infrequent occurrence of single mutations in topoisomerase IV and DNA gyrase genes among US levofloxacin-susceptible clinical isolates of Streptococcus pneumoniae from nine institutions (1999-2003).
Davies TA, Yee YC, Goldschmidt R, Bush K, Sahm DF, Evangelista A. Infrequent occurrence of single mutations in topoisomerase IV and DNA gyrase genes among US levofloxacin-susceptible clinical isolates of Streptococcus pneumoniae from nine institutions (1999-2003). J Antimicrob Chemother. 2006 Mar; 57(3):437-42.