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• W4379509055 abstract "Streptococcus pneumoniae (pneumococcus) is a leading cause of morbidity and mortality worldwide. Although multi-valent pneumococcal vaccines have curbed the incidence of disease, their introduction has resulted in shifted serotype distributions that must be monitored. Whole genome sequence (WGS) data provide a powerful surveillance tool for tracking isolate serotypes, which can be determined from nucleotide sequence of the capsular polysaccharide biosynthetic operon (cps). Although software exists to predict serotypes from WGS data, most are constrained by requiring high-coverage next-generation sequencing reads. This can present a challenge in respect of accessibility and data sharing. Here we present PfaSTer, a machine learning-based method to identify 65 prevalent serotypes from assembled S. pneumoniae genome sequences. PfaSTer combines dimensionality reduction from k-mer analysis with a Random Forest classifier for rapid serotype prediction. By leveraging the model's built-in statistical framework, PfaSTer determines confidence in its predictions without the need for coverage-based assessments. We then demonstrate the robustness of this method, returning >97 % concordance when compared to biochemical results and other in silico serotyping tools. PfaSTer is open source and available at: https://github.com/pfizer-opensource/pfaster." @default.
• W4379509055 created "2023-06-07" @default.
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• W4379509055 date "2023-06-06" @default.
• W4379509055 modified "2023-10-18" @default.
• W4379509055 title "PfaSTer: a machine learning-powered serotype caller for Streptococcus pneumoniae genomes" @default.
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• W4379509055 doi "https://doi.org/10.1099/mgen.0.001033" @default.
• W4379509055 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37279053" @default.
• W4379509055 hasPublicationYear "2023" @default.
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