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Oxygen enhances virulence gene expression in EAEC 042. Strains 17‐2 or 042 were incubated in the vertical diffusion chamber with (+) or without (−) polarised T84 cells for 3 hr under aerobic (AE) or microaerobic (MA) conditions. Expression of selected virulence genes in planktonic bacteria was determined by qPCR and is indicated as fold change under AE versus MA conditions (n = 3 in duplicate for +T84, n = 5 in duplicate for −T84). * P < 0.05, ** P < 0.01, *** P < 0.001
