title: Demonstration of polysaccharide capsule in Campylobacter jejuni using electron microscopy.
abstract: Recently, we reported that Campylobacter jejuni, an important gastrointestinal pathogen, has the genetic determinants to produce a capsular polysaccharide (Karlyshev et al., Mol. Microbiol. 35:529-541, 2000). Despite these data, the presence of a capsule in these bacteria has remained controversial. In this study we stain C. jejuni cells with the cationic dye Alcian blue and demonstrate for the first time by electron microscopy that C. jejuni cells produce a polysaccharide capsule that is retained in the coccoid form but is absent in a kpsM mutant.
authors.affiliation: Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, University of London, London WC1E 7HT, United Kingdom.
authors.forename: A V
authors.initials: AV
authors.lastname: Karlyshev
authors.forename: M V
authors.initials: MV
authors.lastname: McCrossan
authors.forename: B W
authors.initials: BW
authors.lastname: Wren
mesh_terms: D000423:Alcian Blue / Q000378:metabolism; D016667:Bacterial Capsules / Q000378:metabolism / Q000648:ultrastructure*; D016123:Campylobacter jejuni / Q000378:metabolism / Q000648:ultrastructure*; D006801:Humans; D008854:Microscopy, Electron
chemical_list: D000423:Alcian Blue