title: Characteristics of hemolytic and hemagglutinating activities of Treponema denticola.
abstract: Treponema denticola, a suspected periodontal pathogen, was shown to agglutinate and lyse human red blood cells. Both activities were cell-associated, heat-labile, and produced during the exponential growth phase. Hemolytic activity was time-dependent and required incubation at 37 degrees C; further incubation at 4 degrees C increased the hemolysis. Hemagglutination was reduced in the presence of D-glucosamine, EDTA or sodium salicylate, whereas hemolytic activity was affected by calcium chloride, magnesium chloride, EDTA or sodium salicylate. These biological activities may favor a higher concentration of hemin-containing compounds in periodontal sites, and therefore represent additional potential virulence mechanisms.
authors.affiliation: Département de Santé Buccale, Université de Montréal.
authors.forename: D
authors.initials: D
authors.lastname: Grenier
mesh_terms: D006384:Hemagglutination; D006427:Hemin / Q000378:metabolism; D006461:Hemolysis; D013696:Temperature; D014208:Treponema / Q000502:physiology*
chemical_list: D006427:Hemin