Diversity and antimicrobial resistance in the Streptococcus bovis/Streptococcus equinus complex (SBSEC) isolated from Korean domestic ruminants

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Title
Diversity and antimicrobial resistance in the Streptococcus bovis/Streptococcus equinus complex (SBSEC) isolated from Korean domestic ruminants
Author(s)
Seon Young Park; M Lee; Se Ra Lim; Hyemin Kwon; Ye Seul Lee; Ji Hyung Kim; S Seo
Bibliographic Citation
Microorganisms, vol. 9, no. 1, pp. 98-98
Publication Year
2021
Abstract
S. bovis/S. equinus complex (SBSEC) includes lactic acid-producing bacteria considered as the causative agent associated with acute rumen lactic acidosis in intensive ruminants. Considering the limited information on the detailed characteristics and diversity of SBSEC in Korea and the emergence of antimicrobial resistance (AMR), we investigated the diversity of SBSEC from domestic ruminants and verified the presence of antimicrobial resistance genes (ARGs) against several antimicrobials with their phenotypic resistance. Among 51 SBSEC isolates collected, two SBSEC members (S. equinus and S. lutetiensis) were identified; sodA-based phylogenetic analyses and comparisons of overall genome relatedness revealed potential plasticity and diversity. The AMR rates of these SBSEC against erythromycin, clindamycin, and tetracycline were relatively lower than those of other SBSEC isolates of a clinical origin. An investigation of the ARGs against those antimicrobials indicated that tetracycline resistance of SBSECs generally correlated with the presence of tet(M)-possessing Tn916-like transposon. However, no correlation between the presence of ARGs and phenotypic resistance to erythromycin and clindamycin was observed. Although a limited number of animals and their SBSEC isolates were examined, this study provides insights into the potential intraspecies biodiversity of ruminant-origin SBSEC and the current status on antimicrobial resistance of the bacteria in the Korean livestock industry.
Keyword
Streptococcus bovisBovine acidosisGenomeTet(M)-possessing tn916-like transposon
ISSN
2076-2607
Publisher
MDPI
DOI
http://dx.doi.org/10.3390/microorganisms9010098
Type
Article
Appears in Collections:
Division of Research on National Challenges > Infectious Disease Research Center > 1. Journal Articles
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