title: [Changes in surface characteristics of group A streptococci].
abstract: We examined the surface characteristics of four group A Streptococcus strains in log or stationary phase of growth by using the techniques of salt aggregation and of adhesion to n-hexadecane. By means of the former technique a greater correlation was observed between surface hydrophobicity and production of M protein (above all in stationary phase of bacteria). Using the latter one, we noted differences depending on the growth phase, but not related to M protein. The pretreatment of bacteria with subCMI of clindamycin decreases their hydrophobicity, particularly in M+ strains and in stationary phase of growth. Less variations of surface were observed in M- strains and after treatment with subCMI of imipenem.
authors.affiliation: Istituto di Microbiologia, Università di Torino.
authors.forename: D
authors.initials: D
authors.lastname: Savoia
authors.forename: F
authors.initials: F
authors.lastname: Vulcano
authors.forename: M G
authors.initials: MG
authors.lastname: Martinotti
mesh_terms: D000942:Antigens, Bacterial; D001422:Bacterial Adhesion / Q000187:drug effects; D001425:Bacterial Outer Membrane Proteins; D001426:Bacterial Proteins / Q000502:physiology*; D002352:Carrier Proteins; D002462:Cell Membrane / Q000502:physiology; D002981:Clindamycin / Q000494:pharmacology; D015378:Imipenem / Q000494:pharmacology; D013297:Streptococcus pyogenes / Q000187:drug effects / Q000502:physiology*
chemical_list: D000942:Antigens, Bacterial; D001425:Bacterial Outer Membrane Proteins; D001426:Bacterial Proteins; D002352:Carrier Proteins; C014689:streptococcal M protein; D002981:Clindamycin; D015378:Imipenem
vernacular_title: Variazioni nelle caratteristiche di superficie degli streptococchi di gruppo A.