Whole-genome sequencing of the investigated A. actinomycetemcomitans R type isolates and S strains was performed on a Nanopore MinION and Illumina platform. Subsequently, a hybrid assembly of the Nanopore and Illumina sequence data was performed using SPAdes version 3.11 (http://bioinf.spbau.ru/en/content/spades-311-released) (79 (link)). SNP analyses were performed based on short-read sequencing data using Breseq 0.35.7 (80 (link)). The sequence analyses showed that the investigated clinical A. actinomycetemcomitans isolates and their derivative strains lacked extrachromosomal elements, such as plasmids.
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