Galia Barkai*, David Greenberg*, Noga Givon-Lavi*, Eli Dreifuss†, Daniel Vardy†, and Ron Dagan*
Figure 4. . Distribution of penicillin MICs (μg/mL) in erythromycin-susceptible and erythromycin-resistant Streptococcus pneumoniae isolated during episodes of acute otitis media in Bedouin and Jewish children <5 years of age in southern Israel from 1999 through 2003. P was calculated for the difference in overall distribution of penicillin MICs between erythromycin-susceptible and erythromycin-resistant isolates, as well as for difference in relative contribution of isolates with MICs ≥1.0 μg/mL to both groups (p<0.001, Ery-S versus Ery-R in both Bedouin and Jewish children). Ery-S, erythromycin susceptible; Ery-R, erythromycin resistant; Pen-MIC, penicillin MIC.