title: Molecular mechanisms of Streptococcus dysgalactiae subsp equisimilis enabling intravascular persistence.
abstract: Streptococcus dysgalactiae subsp. equisimilis (SDSE) can cause recurrent bacteremic infection. We have characterized novel virulence properties of an SDSE isolate of type stG485.0 that caused severe sepsis three times in a patient despite that he had opsonizing antibodies to the isolate. An infected aortic aneurysm was suspected to be the focus for the persisting bacteria. For the first time we show that this SDSE isolate, as well as other invasive SDSE isolates, aggregate human platelets and efficiently internalize into human endothelial cells. These properties may aid SDSE to persist and could explain the tendency of SDSE to cause recurrent bacteremia.
authors.affiliation: Department of Medical Microbiology, Helmholtz Centre for Infection Research, Braunschweig, Germany.
authors.forename: Manfred
authors.initials: M
authors.lastname: Rohde
authors.forename: Susanne R
authors.initials: SR
authors.lastname: Talay
authors.forename: Magnus
authors.initials: M
authors.lastname: Rasmussen
mesh_terms: D000907:Antibodies, Bacterial / Q000097:blood / Q000276:immunology; D042783:Endothelial Cells / Q000382:microbiology / Q000648:ultrastructure; D005353:Fibronectins / Q000276:immunology / Q000378:metabolism; D006801:Humans; D010974:Platelet Aggregation / Q000276:immunology; D011485:Protein Binding; D013290:Streptococcal Infections / Q000276:immunology / Q000382:microbiology*; D013291:Streptococcus / Q000276:immunology / Q000472:pathogenicity* / Q000648:ultrastructure; D014774:Virulence / Q000276:immunology
chemical_list: D000907:Antibodies, Bacterial; D005353:Fibronectins