title: Amplification of 16S ribosomal RNA gene sequences for the identification of streptococci of Lancefield group B.
abstract: The 16S r RNA gene of 49 streptococci of serological group B isolated from various origins was amplified by polymerase chain reaction (PCR) and subsequently digested with the restriction enzymes Rsa I and Msp I. The restriction profiles of all group B streptococci appeared to be identical indicating no intraspecies sequence variations of this gene. A fragment of the gene of two group B-streptococcal reference strains, including the hypervariable V2 region, could be amplified by PCR and sequenced. The sequence appeared to be identical and allowed the design of species-specific oligonucleotide primers. The primer pair used produced an amplicon with a size of 1250 bp and correctly identified all 49 group B-streptococci investigated but none of the control strains of various species and serogroups. This primer could be used in a multiplex PCR and allowed a rapid identification of bacteria of this species.
authors.affiliation: Institut für Tierärztliche Nahrungsmittelkunde, Bakteriologie und Hygiene der Milch, Justus-Liebig Universität Giebetaen, Frankfurter Str. 107, Giebetaen, 35392, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Abdulmawjood
authors.forename: C
authors.initials: C
authors.lastname: Lämmler
mesh_terms: D001483:Base Sequence; D017931:DNA Primers / Q000378:metabolism; D019003:Deoxyribonuclease HpaII / Q000378:metabolism; D015252:Deoxyribonucleases, Type II Site-Specific / Q000378:metabolism; D005784:Gene Amplification; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D012329:RNA, Bacterial / Q000235:genetics*; D012336:RNA, Ribosomal, 16S / Q000235:genetics*; D013291:Streptococcus / Q000235:genetics / Q000302:isolation & purification*
chemical_list: D017931:DNA Primers; D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S; D019003:Deoxyribonuclease HpaII; D015252:Deoxyribonucleases, Type II Site-Specific; C040158:GTAC-specific type II deoxyribonucleases