<p>Lungs were obtained at the indicated time points after intranasal inoculation with 500 CFU <i>B</i>. <i>pseudomallei</i>. Paraffin-embedded lung tissue sections were stained with haematoxylin/eosin to score different parameters for pathology (A-B, 2x magnification, representative images). The combined score, given by a blinded pathologist, was not different between the two groups (C). Sections from the same samples were stained for Ly-6GC as a neutrophil marker (representative microphotographs, 2x magnification) (D-E). The percentage Ly-6GC-positive surface of the total lung surface was calculated using ImageJ (F). The number of cells per mL BALF was counted using a Coulter counter (G). Myeloperoxidase was quantified in lung homogenates as a measure for neutrophil degranulation (H). Bone marrow and blood was obtained from naïve control and antibiotic pre-treated mice and using FACS analysis the percentage of Ly6GC+, CD11b+ cells within the viable CD45+ population was determined (I). Data are presented as box- and whisker plots showing the smallest observation, lower quartile, median, upper quartile and largest observation. White bars represent control mice, grey bars antibiotic treated mice. No statistically significant differences were found.</p

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