Population Structure and Antimicrobial Resistance of Invasive Serotype IV Group B Streptococcus, Toronto, Ontario, Canada

Teatero, Sarah; McGeer, Allison; Li, Aimin; Gomes, Janice; Seah, Christine; Demczuk, Walter; Martin, Irene; Wasserscheid, Jessica; Dewar, Ken; Melano, Roberto G.; Fittipaldi, Nahuel

doi:10.3201/eid2014.140759

i

Population Structure and Antimicrobial Resistance of Invasive Serotype IV Group B Streptococcus, Toronto, Ontario, Canada

Supporting Files Public Domain

Apr 2015
By Teatero, Sarah ; McGeer, Allison ; Li, Aimin ; ...

File Language:

English

Details

Alternative Title:

Emerg Infect Dis
Personal Author:

Teatero, Sarah ; McGeer, Allison ; Li, Aimin ; Gomes, Janice ; Seah, Christine ; Demczuk, Walter ; Martin, Irene ; Wasserscheid, Jessica ; Dewar, Ken ; Melano, Roberto G. ; Fittipaldi, Nahuel
Description:

We recently showed that 37/600 (6.2%) invasive infections with group B Streptococcus (GBS) in Toronto, Ontario, Canada, were caused by serotype IV strains. We report a relatively high level of genetic diversity in 37 invasive strains of this emerging GBS serotype. Multilocus sequence typing identified 6 sequence types (STs) that belonged to 3 clonal complexes. Most isolates were ST-459 (19/37, 51%) and ST-452 (11/37, 30%), but we also identified ST-291, ST-3, ST-196, and a novel ST-682. We detected further diversity by performing whole-genome single-nucleotide polymorphism analysis and found evidence of recombination events contributing to variation in some serotype IV GBS strains. We also evaluated antimicrobial drug resistance and found that ST-459 strains were resistant to clindamycin and erythromycin, whereas strains of other STs were, for the most part, susceptible to these antimicrobial drugs.
Subjects:

Adolescent Adult Aged Age Distribution Anti-Infective Agents Child Child, Preschool Computational Biology Drug Resistance, Bacterial Genetic Variation Humans Infant Infant, Newborn Microbial Sensitivity Tests Middle Aged Multilocus Sequence Typing Phylogeny Population Surveillance Serogroup Streptococcal Infections Streptococcus Agalactiae Young Adult
Source:

Emerg Infect Dis. 21(4):585-591.
Document Type:

Journal Article
Place as Subject:

Toronto, Ontario
Location:

North America
Volume:

21
Issue:

4
Collection(s):

Emerging Infectious Diseases
Main Document Checksum:

urn:sha256:0145e93c13d48458f5f76bd509d8e2192ff00b585e28de0b2f9a002757606ce8
Download URL:

https://stacks.cdc.gov/view/cdc/29308/cdc_29308_DS1.pdf
File Type:

[PDF - 1.21 MB ]

File Language:

English

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