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SEM analysis of bacterial attachment to A549 human alveolar epithelial cells. Uninfected and healthy A549 cells covered by surfactant are shown in micrograph A as a negative control. A549 cells were infected with A. baumannii ATCC 17978 strain (B), with the MAR002 parental strain (C) and (D), with the MAR002 mutant strain lacking LH92_11085 (Δ11085) (E) or the mutant strain (Δ11085) complemented (F). All micrographs were taken at 5,000x magnification. Bars indicate the scale (2 µm).
