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Non-typeable Haemophilus influenzae (NTHi) adheres to and invades airway epithelial cells. NTHi adhering to ciliated airway epithelial cells in vitro. a) Primary bronchial epithelial cells grown in air–liquid interface; scanning electron micrograph ×21 900 magnification, multiplicity of infection (MOI) 200. b) NTHi being internalised by epithelial cells; ×18 900 magnification, MOI 20. Scale bars: 1 µm. Images by Maisha Jabeen.
