A monogenic recessive mutation in the cystic fibrosis transmembrane receptor (CFTR) causes impaired mucociliary clearance and increased susceptibility to numerous pathogens, including but not limited to P. aeruginosa, S. aureus, Haemophilus influenzae, Burkholderia cepacia, and Mycobacterium abscesses (Harrison 2007, Hall-Stoodley and McCoy 2022). This evidence concerns the gene CFTR and abscess.