Cell-cycle analysis of total splenocytes and TER119⁺ erythroblasts from naive and infected mice with or without EPO treatment. For TER119⁺ erythroblasts, splenocytes were stained with FITC-conjugated anti-TER119 antibody prior to fixation and analysis. Cell-cycle distribution of total splenocytes (A) and TER119⁺ erythroblasts (B). Data are means for 4 to 5 mice per group. Standard errors were less than 10% for all means and are not shown. N indicates untreated naive controls; N+EPO, naive mice treated with EPO; I, untreated infected controls; I+EPO, infected mice treated with EPO. When 2 sets of data are labeled with superscripts of different letters, it indicates that these 2 sets of data are statistically different (P < .05). Similar results were obtained in 2 independent experiments.