Proinflammatory cytokine concentrations were measured in regional BAL specimens from all CF patients (n=14 patients= 84 lobar BALs) via V-PLEX array. Data from each specimen were stratified based upon type of microbial infection [No P.a. (n=29), Nonmucoid (n=9), Mucoid (n=32), Mixed (n=14)]. A. IL-1β (pg/mL) B. TNF-α (pg/mL) C. IL-6 (pg/mL) D. IL-8 (pg/mL). Statistical significance was determined via non-parametric, Kruskal–Wallis one-way analysis of variance (ANOVA). *p<0.05, **p<0.01, ***p<0.001, ns- not statistically significant.