TABLE 3.

Preferred carbon sources in CF sputum and SCFMa

Carbon source% ± SD of remaining carbon after growth in:
CF sputumSCFM
Proline18 ± 020 ± 9
Alanine26 ± 1331 ± 10
Arginine37 ± 30
Lactate45 ± 354 ± 8
Glutamate46 ± 2041 ± 9
Aspartate51 ± 1024 ± 9
  • a The six carbon sources quantitatively consumed first by P. aeruginosa during growth in 20% CF sputum medium and in SCFM. Shown are the percentages ± standard deviations (SD) of the initial carbon source remaining after P. aeruginosa growth in CF sputum (2 h) and in SCFM (3 h). A later time point was used for SCFM since it contains 5 times more carbon than 20% CF sputum. See Materials and Methods for experimental details and Tables S4 and S5 in the supplemental material for data on all available carbon sources.