Cytokines and chemokines profiling of the BEAS-2B cells in response to bacterial stimulation: (a) IL-8, (b) IL-6, (c) TNF-α, (d) CCL2, (e) CCL20 and (f) CXCL2. Strains are identified as follows: EMS, Streptococcus strains; EME, Enterococcus strains; EMP, Pantoea. For the challenge assay, BEAS-2B cells were co-incubated with bacterial strains (MOI of 100:1) for 6 h, in 25 cm2 tissue culture flasks. Cytokines and chemokines were quantified by using multiplex-magnetic-beads-based assay. Data are the mean of secreted proteins (pg/mL) ± SEM of four biological replicates (with two technical replicates each). p-values: *: p < 0.03, **: p < 0.002, ***: p < 0.0002 and ****: p < 0.0001.