Cholinergic innervation of RSV-infected fetal airways.

<p>Sections of fetuses delivered from dams inoculated with rrRSV or from pathogen-free controls co-stained with polyclonal antibodies against acetylcholine and NGF. Immunohistochemical analysis by confocal microscopy found increased acetylcholine immunoreactivity in the subepithelial neural plexus lining the lumen of fetal airways exposed <i>in utero</i> to RSV and co-expressing NGF immunoreactivity (<b><i>asterisks</i></b>). In contrast, noradrenaline and substance P immunoreactivity was very weak in all fetuses.