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. 2004 Oct;72(10):5807–5813. doi: 10.1128/IAI.72.10.5807-5813.2004

FIG. 1.

FIG. 1.

Levels of pneumococcal colonization in comparison with serum antibody titer over time. The density of pneumococcal colonization, expressed as log CFU per milliliter of upper respiratory tract lavage fluid, was determined for BALB/c (A), C57BL/6 (B), and CBA/J (C) mice at the postinoculation day indicated. Whole bacteria (P1121) and strain-specific PspA total immunoglobulin titers were determined by ELISA. Values shown are the mean CFU per milliliter or titers ± standard errors of the means.