In a previous work [25], we investigated the relationship between TAS2R38 polymorphisms in a cohort of PCD patients and found that haplotypes AVI/AVI and PAV/AVI are correlated with some clinical phenotypes, such as frequent exacerbations and chronic colonization by Pseudomonas aeruginosa, supporting the possible role of the TAS2R38 gene in susceptibility towards respiratory infections. This evidence concerns the gene TAS2R38 and primary ciliary dyskinesia.