(A) percentage of ΔagrBD (AIP-responsive in-frame deletion mutant carrying an intact RNAIII) cells and (B) bacterial burden in lung or spleen after 2 hr of intraperitoneal infection of wild-type (WT) C57BL/6 mice or phagocyte NADPH oxidase-deficient (Cybb-/-) mice (see Figure 9—figure supplement 1 for data with other organs). Here, CYBB is linked to infection.