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S. parasanguinis increases extracellular nitrite in CF bronchial epithelial cells. (A) Extracellular nitrite was measured in 16HBE and CFBE cells; n = 24. **P < 0.01 (Mann-Whitney test). After infection with mPA08 (B) or PAO1 (C) with or without S. parasanguinis (SP) or the poxL mutant, extracellular nitrite was measured. Error bars represent standard deviation. n = 4–10; ***P < 0.001, ****P < 0.0001 (two-way ANOVA, Tukey’s post hoc test).
