title: Pneumolysin is a key factor in misidentification of macrolide-resistant Streptococcus pneumoniae and is a putative virulence factor of S. mitis and other streptococci.
abstract: We evaluated the applicability of ply PCR for confirmation of the identification of Streptococcus pneumoniae. lytA PCR, 16S rRNA sequencing, and amplified-fragment length polymorphism were used as reference methods. In contrast to the lytA gene, the ply gene proved to be not specific for S. pneumoniae. The presence of the ply gene in other streptococci, in particular Streptococcus mitis, suggests that pneumolysin plays a pathogenic role.
authors.affiliation: Department of Intensive Care Medicine, University Hospital St. Radboud, Nijmegen, The Netherlands.
authors.forename: Chris
authors.initials: C
authors.lastname: Neeleman
authors.forename: Corné H W
authors.initials: CH
authors.lastname: Klaassen
authors.forename: Debbie M
authors.initials: DM
authors.lastname: Klomberg
authors.forename: Hanneke A
authors.initials: HA
authors.lastname: de Valk
authors.forename: Johan W
authors.initials: JW
authors.lastname: Mouton
mesh_terms: D001426:Bacterial Proteins / Q000235:genetics*; D001483:Base Sequence; D017931:DNA Primers; D016133:Polymerase Chain Reaction / Q000379:methods; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D013291:Streptococcus / Q000145:classification / Q000235:genetics*; D013296:Streptococcus pneumoniae / Q000235:genetics* / Q000472:pathogenicity; D013301:Streptolysins / Q000235:genetics*; D014774:Virulence
chemical_list: D001426:Bacterial Proteins; D017931:DNA Primers; D012336:RNA, Ribosomal, 16S; D013301:Streptolysins; C032290:plY protein, Streptococcus pneumoniae