refMLST: Reference-based Multilocus Sequence Typing Enables Universal Bacterial Typing

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Abstract Summary Commonly used approaches for genomic investigation of bacterial outbreaks, including SNP and gene-by-gene approaches, are limited by the requirement for curated allele schemes. As a result, they only work on a select subset of known organisms, and fail on novel or less studied pathogens. We introduce refMLST, a gene-by-gene approach using the reference genome of a bacterium to form a scalable, reproducible and robust method to perform outbreak investigation. When applied to 1263 Salmonella enterica genomes, refMLST enabled consistent clustering, improved resolution and faster processing in comparison to chewieSnake. refMLST is applicable to any bacterial species with a public genome, does not require a curated scheme, and automatically accounts for genetic recombination. Availability and Implementation refMLST is freely available for academic use at https://bugseq.com/academic .

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