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Lung histology. Sections of the lungs were prepared 48 h after infection with 5 × 106 cfu of P. aeruginosa. There was more infiltration by inflammatory cells in the lungs of SP-A−/− (B), SP-D−/− (C), and SP-AD−/− (D) mice compared with WT mice (A). These sections are representative of three different animals per genotype.
