Common bacterial phyla in sputum from people with PS cystic fibrosis and PI cystic fibrosis#
| Phylum | Share of total abundance | |
| PS sputum | PI sputum | |
| Actinobacteria | 36.7% | 22.9% |
| Bacteroidetes | 9.2% | 1.1% |
| Firmicutes | 35.8% | 25.2% |
| Fusobacteria | 0.8% | 0.1% |
| Proteobacteria | 17.3% | 50.6% |
PS: exocrine pancreatic sufficient; PI: exocrine pancreatic insufficient. #: note that most bacteria with mechanically labile membranes such as Tenericutes (Mycoplasma species) are lost during the processing of the samples. Direct sequencing of unprocessed respiratory specimens yielded a share of ∼3% of bacterial reads assigned to Tenericutes. However, species with hard-to-digest cell walls, like Nocardia or Mycobacteria, were not detected in unprocessed specimens.