The results showed that S. boulardii CW extract could be a candidatefor regulating IL-13- and IL-17-induced Aspergillus fumigatus-mediated allergy and asthma.Nevertheless, future studies need to be conducted on the safety of S. boulardii CW extract in vivo and its effects on other arms of allergic hypersensitivity. Here, IL17A is linked to asthma.