Draft Genome Sequence of Dichelobacter nodosus ATCC 25549, Strain VPI 2340 [11342], a Bacterium Causing Footrot in Sheep

Jackson, Alexandra; Humbert, María Victoria; Pandey, Anish; Bratcher, Holly B.; Christodoulides, Myron

doi:10.1128/genomea.01002-15

Cited by 2 publications

(1 citation statement)

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“…All assembly contig files were uploaded to the D. nodosus PubMLST BIGSdb database ( https://pubmlst.org/dnodosus/ ) (Jolley and Maiden, 2010 ) for analysis. Isolate definitions and metadata were used from the sequence read archive (Kennan et al, 2014 ; Jackson et al, 2015 ). To identify the loci suitable for MLST, the annotated assembled genomes were used to identify the core genome using BIGSdb (Jolley and Maiden, 2010 ).…”

Section: Methodsmentioning

confidence: 99%

The Applied Development of a Tiered Multilocus Sequence Typing (MLST) Scheme for Dichelobacter nodosus

Blanchard¹,

Jolley²,

Maiden³

et al. 2018

Front. Microbiol.

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Dichelobacter nodosus (D. nodosus) is the causative pathogen of ovine footrot, a disease that has a significant welfare and financial impact on the global sheep industry. Previous studies into the phylogenetics of D. nodosus have focused on Australia and Scandinavia, meaning the current diversity in the United Kingdom (U.K.) population and its relationship globally, is poorly understood. Numerous epidemiological methods are available for bacterial typing; however, few account for whole genome diversity or provide the opportunity for future application of new computational techniques. Multilocus sequence typing (MLST) measures nucleotide variations within several loci with slow accumulation of variation to enable the designation of allele numbers to determine a sequence type. The usage of whole genome sequence data enables the application of MLST, but also core and whole genome MLST for higher levels of strain discrimination with a negligible increase in experimental cost. An MLST database was developed alongside a seven loci scheme using publically available whole genome data from the sequence read archive. Sequence type designation and strain discrimination was compared to previously published data to ensure reproducibility. Multiple D. nodosus isolates from U.K. farms were directly compared to populations from other countries. The U.K. isolates define new clades within the global population of D. nodosus and predominantly consist of serogroups A, B and H, however serogroups C, D, E, and I were also found. The scheme is publically available at https://pubmlst.org/dnodosus/.

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