ArticleFrontiers in cellular and infection microbiology2021
Transition of Serotype 35B Pneumococci From Commensal to Prevalent Virulent Strain in Children.
Article in Frontiers in cellular and infection microbiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed, 14 citations in OpenAlex.
- Eighteen-Year Longitudinal Study of Uncomplicated and Complex Acute Otitis Media During the Pneumococcal Conjugate Vaccine Era, 2006-2023.The Journal of infectious diseases · 2025Article
- Pneumococci Isolated From Children in Community-Based Practice Differ From Isolates Identified by Population- and Laboratory-Based Invasive Disease Surveillance.The Journal of infectious diseases · 2024Article
- Genomic classification and antimicrobial resistance profiling of Streptococcus pneumoniae and Haemophilus influenza isolates associated with paediatric otitis media and upper respiratory infection.BMC infectious diseases · 2023Article
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Authors and funding
6 authors at 2 institutions in 1 country.
Funding
Abstract
In our community-based prospective cohort study in young children, we observed a significant increase in pneumococcal serotype 35B nasopharyngeal (NP) commensal colonization during the 2011-2014 timeframe, but these strains were not associated with disease. Beginning in 2015 and continuing through to the present, the serotype 35B virulence changed, and it became the dominant bacteria isolated and associated with pneumococcal acute otitis-media (AOM) in our cohort. We performed comparative analyses of 250 35B isolates obtained from 140 children collected between 2006 and 2019. Changes in prevalence, clonal-complex composition, and antibiotic resistance were analyzed. Seventy-two (29%) of 35B isolates underwent whole-genome sequencing to investigate genomic changes associated with the shift in virulence that resulted in increased rates of 35B-associated AOM disease. 35B strains that were commensals and AOM disease-causing were mainly associated with sequence type (ST) 558. Antibiotic concentrations of β-lactams and ofloxacin necessary to inhibit growth of 35B strains rose significantly (2006-2019) (p<0.005). However, only isolates from the 35B/ST558 showed significant increases in MIC
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