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Light microscopy of lung tissue from mice infected with 106CFU of S. pneumoniae. SP-D-/- 24 h post-infection (figure 5), SP-D+/+ 24 h post-infection (figure 6), SP-D-/- 48 h post-infection (figure 7) and SP-D+/+ 48 h post-infection (figure 8). Magnification ×250 for figures 5 and 8, ×400 for figures 6 and 7. See results for description of arrows.
