title: Molecular serotype identification of Streptococcus agalactiae of bovine origin by multiplex PCR-based reverse line blot (mPCR/RLB) hybridization assay.
abstract: We used a multiplex PCR-based reverse line blot (mPCR/RLB) hybridization assay and sequencing of a variable region of the cps cluster to identify serotypes of 140 Streptococcus agalactiae (group B Streptococcus; GBS) isolates from cattle. Only 71 (51%) isolates were typeable using antisera, but molecular serotypes (MS) were assigned to 133 (95%) and 139 (99%) isolates by partial cpsE-cpsF-cpsG sequencing and mPCR/RLB, respectively. Ninety-four isolates (67%) belonged to MS III and most belonged to a molecular serosubtype (msst) III-3, which is uncommon among GBS isolates from humans. Our results demonstrate that cps clusters of bovine GBS differ significantly from those of GBS isolates from humans.
authors.affiliation: Centre for Infectious Diseases and Microbiology, Institute of Clinical Pathology and Medical Research, Westmead, NSW, Australi.
authors.forename: Zuotao
authors.initials: Z
authors.lastname: Zhao
authors.forename: Fanrong
authors.initials: F
authors.lastname: Kong
authors.forename: Gabriela
authors.initials: G
authors.lastname: Martinez
authors.forename: Xianyu
authors.initials: X
authors.lastname: Zeng
authors.forename: Marcelo
authors.initials: M
authors.lastname: Gottschalk
authors.forename: Gwendolyn L
authors.initials: GL
authors.lastname: Gilbert
mesh_terms: D000818:Animals; D015373:Bacterial Typing Techniques; D002417:Cattle; D004269:DNA, Bacterial / Q000032:analysis*; D009693:Nucleic Acid Hybridization; D016133:Polymerase Chain Reaction / Q000379:methods*; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000379:methods; D013292:Streptococcus agalactiae / Q000145:classification / Q000235:genetics / Q000302:isolation & purification*
chemical_list: D004269:DNA, Bacterial