M. Catherine McEllistrem*
, Jennifer M. Adams*, Kathleen Shutt*, Laurie T. Sanza†, Richard R. Facklam‡, Cynthia G. Whitney‡, James H. Jorgensen§, and Lee H. Harrison*†
Figure. . From 1995 to 2001, the proportion of erythromycin-nonsusceptible pneumococcal strains carrying the mefE gene increased over time by county, season, race, and age group. p<0.01 for all trends except for Anne Arundel County and May–October season (p = 0.02 for those comparisons).