<?xml version='1.0' encoding='UTF-8'?><xml><records><record><source-app name="HighWire" version="7.x">Drupal-HighWire</source-app><ref-type name="Journal Article">17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">SONG, JAE-JUN</style></author><author><style face="normal" font="default" size="100%">NOH, INSUP</style></author><author><style face="normal" font="default" size="100%">CHAE, SUNG-WON</style></author></authors><secondary-authors></secondary-authors></contributors><titles><title><style face="normal" font="default" size="100%">Inhibition of Biofilm Formation on Ventilation Tubes by Surface Modification</style></title><secondary-title><style face="normal" font="default" size="100%">In Vivo</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2012</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2012-11-01 00:00:00</style></date></pub-dates></dates><pages><style  face="normal" font="default" size="100%">907-911</style></pages><volume><style face="normal" font="default" size="100%">26</style></volume><issue><style face="normal" font="default" size="100%">6</style></issue><abstract><style  face="normal" font="default" size="100%">Aim: The purpose of this study was to modify the surface characteristics of a ventilation tube (VT) with polyethylene glycol (PEG) coating and to evaluate the effect on biofilm formation. Materials and Methods: VTs made of polyethylene were coated with PEG. Streptococcus pneumonia R6 strain was used and a crystal violet assay was carried out to measure the in vitro and in vivo biofilm formation of rats bearing VTs. Results: In the in vitro experiment, the optical density of the uncoated VT was 0.34±0.09 and the optical density of the PEG-grafted VT was 0.22±0.06 (p&lt;0.05). In the in vivo experiment, the optical density of the uncoated VT was 0.54±0.12 and that of the PEG-grafted VT was 0.32±0.13 (p&lt;0.05). Scanning electron microscopy showed that surface modification, roughness and hydrophilic characteristics improved and biofilm formation decreased. Conclusion: The reduced biofilm formation on the VT may be explained by the alteration of surface tension and roughness induced by PEG coating.</style></abstract></record></records></xml>