IL1B and infection: To assess the immunological response of C57BL/6J- Cftrtm1UncTg(FABPhCFTR)1Jaw/J mice to S. maltophilia and P. aeruginosa polymicrobial infection, we measured inflammatory markers in the BALF by multiplex assay for IL-1α, IL-1β, IL-6 and TNF-α.