Table 1.

Population densities of P. aeruginosa in catheter biofilms

Catheter typeNo. of viable cells in 48-h biofilms (CFU/cm of catheter [mean ± SD])a
All silicone(1.8 ± 0.2) × 109
Silicone-coated latex(2.5 ± 0.2) × 108
Hydrogel-coated latex(2.0 ± 0.9) × 108
  • a Calculated from three separate experiments. Analysis of variance on log-transformed data showed significant differences (P > 0.001) between the densities of cells in the biofilms on the all-silicone catheters and those on the coated latex catheters.