TABLE 4.

Multidrug resistance among all S. pneumoniae isolates, erythromycin-resistant isolates by genotype, and levofloxacin-resistant isolates of S. pneumoniae collected during year 1 of the PROTEKT US study (2000-2001)

Isolate and genotypeNo. of isolates% Resistant to the following no. of agentsa:
≥2≥3≥4≥5
Total10,10334.427.220.99.3
Levofloxacin resistant8153.150.625.913.6
Erythromycin resistant3,13389.174.666.430.1
    mef(A)2,15787.373.065.719.2
    erm(B)53097.075.763.149.2
    erm(B) mef(A)30499.795.492.483.2
  • a Analysis includes erythromycin, cefuroxime, co-trimoxazole, penicillin, and tetracycline.