“…Furthermore, in addition to a correlation with IgG, anti-pseudomonal IgA also correlated with the pro-inflammatory biomarkers CRP, IL-8 and cathepsins S and B. Although important in host defence against respiratory viruses, IgA may be less important in bacterial infections; however, measuring specific IgA titres from P. aeruginosa may be useful for differentiating between active infection and colonisation [28,34]. Some transmissible strains of P. aeruginosa are more virulent that non-transmissible strains, especially within the CF population.…”