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Review
. 2016 Jun 24;5(3):45.
doi: 10.3390/pathogens5030045.

Current Taxonomical Situation of Streptococcus suis

Masatoshi Okura  1 , Makoto Osaki  2 , Ryohei Nomoto  3 , Sakura Arai  4 , Ro Osawa  5 , Tsutomu Sekizaki  6 , Daisuke Takamatsu  7   8
Affiliations
Review

Current Taxonomical Situation of Streptococcus suis

Masatoshi Okura et al. Pathogens. .

Abstract

Streptococcus suis, a major porcine pathogen and an important zoonotic agent, is considered to be composed of phenotypically and genetically diverse strains. However, recent studies reported several "S. suis-like strains" that were identified as S. suis by commonly used methods for the identification of this bacterium, but were regarded as distinct species from S. suis according to the standards of several taxonomic analyses. Furthermore, it has been suggested that some S. suis-like strains can be assigned to several novel species. In this review, we discuss the current taxonomical situation of S. suis with a focus on (1) the classification history of the taxon of S. suis; (2) S. suis-like strains revealed by taxonomic analyses; (3) methods for detecting and identifying this species, including a novel method that can distinguish S. suis isolates from S. suis-like strains; and (4) current topics on the reclassification of S. suis-like strains.

Keywords: S. suis-like strains; Streptococcus suis; species demarcation; taxonomic analyses.

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Conflict of interest statement

The authors declare no conflicts of interest.

Figures

Figure 1
Figure 1
Timeline summary on the history of the taxon, serological description, identification/detection methods, and major taxonomical analyses (including the findings) of S. suis. DDH, DNA-DNA hybridization. ANI, average nucleotide identity.
See this image and copyright information in PMC

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