Although they are few in number in circulating blood and lungs of healthy individuals [49], eosinophils are more frequent in allergic asthma and allergic bronchopulmonary aspergillosis (ABPA), as well as the Th2 cytokine repertory, comprised principally by IL-5 and IL-13 [50]. This evidence concerns the gene IL13 and allergic bronchopulmonary aspergillosis.