Furthermore, high IL-8 levels are associated with asthma exacerbations [26] and raised IL-8 levels in lung lavage are an emerging biomarker for invasive aspergillosis [27], which also correlate with neutrophilia and declining lung function in allergic bronchopulmonary aspergillosis [28]. This evidence concerns the gene CXCL8 and allergic bronchopulmonary aspergillosis.