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Genomic characterization of emerging invasive Streptococcus agalactiae serotype VIII in Alberta, Canada.

ABSTRACT: Invasive Group B Streptococcus (GBS) can infect pregnant women, neonates, and older adults. Invasive GBS serotype VIII is infrequent in Alberta; however, cases have increased in recent years. Here, genomic analysis was used to characterize fourteen adult invasive serotype VIII isolates from 2009 to 2021. Trends in descriptive clinical data and antimicrobial susceptibility results were evaluated for invasive serotype VIII isolates from Alberta. Isolate genomes were sequenced and subjected to molecular sequence typing, virulence and antimicrobial resistance gene identification, phylogenetic analysis, and pangenome determination. Multilocus sequencing typing identified eight ST42 (Clonal Complex; CC19), four ST1 (CC1), and two ST2 (CC1) profiles. Isolates were susceptible to penicillin, erythromycin, chloramphenicol, and clindamycin, apart from one isolate that displayed erythromycin and inducible clindamycin resistance. All isolates carried genes for peptide antibiotic resistance, three isolates for tetracycline resistance, and one for macrolide, lincosamide, and streptogramin resistance. All genomes carried targets currently being considered for protein-based vaccines (e.g., pili and/or Alpha family proteins). Overall, invasive GBS serotype VIII is emerging in Alberta, primarily due to ST42. Characterization and continued surveillance of serotype VIII will be important for outbreak prevention, informing vaccine development, and contributing to our understanding of the global epidemiology of this rare serotype.

SUBMITTER: Williams AN

PROVIDER: S-EPMC10120474 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature

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Genomic characterization of emerging invasive Streptococcus agalactiae serotype VIII in Alberta, Canada.

Williams Ashley N AN Croxen Matthew A MA Demczuk Walter H B WHB Martin Irene I Tyrrell Gregory J GJ

European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology 20230421 6

Invasive Group B Streptococcus (GBS) can infect pregnant women, neonates, and older adults. Invasive GBS serotype VIII is infrequent in Alberta; however, cases have increased in recent years. Here, genomic analysis was used to characterize fourteen adult invasive serotype VIII isolates from 2009 to 2021. Trends in descriptive clinical data and antimicrobial susceptibility results were evaluated for invasive serotype VIII isolates from Alberta. Isolate genomes were sequenced and subjected to mole ...[more]

PMID: 37084119

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Dataset Information

Genomic characterization of emerging invasive Streptococcus agalactiae serotype VIII in Alberta, Canada.

Publications

Genomic characterization of emerging invasive Streptococcus agalactiae serotype VIII in Alberta, Canada.

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