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Epidemiological Study of Erythromycin-Resistant Streptococcus pyogenes From Korea and Japan by emm Genotyping and Multilocus Sequence Typing
BACKGROUND: We determined the epidemiological characteristics of erythromycin (EM)-resistant Streptococcus pyogenes (group A streptococci, GAS) strains isolated from Korea and Japan, using emm genotyping and multilocus sequence typing (MLST). METHODS: Clinical isolates of GAS had been collected from...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Korean Society for Laboratory Medicine
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4697353/ https://www.ncbi.nlm.nih.gov/pubmed/26522753 http://dx.doi.org/10.3343/alm.2016.36.1.9 |
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author | Takahashi, Takashi Arai, Kazuaki Lee, Dong-Hyun Koh, Eun-Ha Yoshida, Haruno Yano, Hisakazu Kaku, Mitsuo Kim, Sunjoo |
author_facet | Takahashi, Takashi Arai, Kazuaki Lee, Dong-Hyun Koh, Eun-Ha Yoshida, Haruno Yano, Hisakazu Kaku, Mitsuo Kim, Sunjoo |
author_sort | Takahashi, Takashi |
collection | PubMed |
description | BACKGROUND: We determined the epidemiological characteristics of erythromycin (EM)-resistant Streptococcus pyogenes (group A streptococci, GAS) strains isolated from Korea and Japan, using emm genotyping and multilocus sequence typing (MLST). METHODS: Clinical isolates of GAS had been collected from 1992 to 2012 in Korea and from 2004 to 2009 in Japan. EM resistance was determined by the microdilution method, and resistance genotypes were assessed by PCR. The emm genotyping and MLST were performed by DNA sequencing. RESULTS: The emm genotypes and sequence types (STs) were concordant in 143 (85.1%) of 168 EM-resistant GAS strains from Korea. ST36/emm12 (35.1%), ST52/emm28 (22.6%), and ST49/emm75 (16.1%) were the most common types. Most of the ST36 (93.9%) and ST52 (95.8%) strains harbored erm(B), whereas strains ST49, ST42, and ST15 contained mef(A). The concordance between emm genotypes and STs was 41 (93.2%) among 44 EM-resistant GAS strains from Japan. ST36/emm12 (34.1%), ST49/emm75 (18.2%), and ST28/emm1 (15.9%) were the major types. ST36 isolates harbored either erm(B) (56.3%) or mef(A) (37.5%), whereas isolates ST28, ST49, and ST38 carried only mef(A). The proportion of erm(B) and mef(A) was 66.1% and 33.3% in Korea and 22.7% and 68.2% in Japan, respectively. CONCLUSIONS: The common STs in Korea and Japan were ST36 and ST49, whereas ST52 was present only in Korea and ST28 only in Japan. Genotype erm(B) was predominant in Korea, whereas mef(A) was frequent in Japan. There were differences between Korea and Japan regarding the frequencies of emm genotypes, STs, and EM resistance genes among the EM-resistant GAS. |
format | Online Article Text |
id | pubmed-4697353 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | The Korean Society for Laboratory Medicine |
record_format | MEDLINE/PubMed |
spelling | pubmed-46973532016-01-04 Epidemiological Study of Erythromycin-Resistant Streptococcus pyogenes From Korea and Japan by emm Genotyping and Multilocus Sequence Typing Takahashi, Takashi Arai, Kazuaki Lee, Dong-Hyun Koh, Eun-Ha Yoshida, Haruno Yano, Hisakazu Kaku, Mitsuo Kim, Sunjoo Ann Lab Med Original Article BACKGROUND: We determined the epidemiological characteristics of erythromycin (EM)-resistant Streptococcus pyogenes (group A streptococci, GAS) strains isolated from Korea and Japan, using emm genotyping and multilocus sequence typing (MLST). METHODS: Clinical isolates of GAS had been collected from 1992 to 2012 in Korea and from 2004 to 2009 in Japan. EM resistance was determined by the microdilution method, and resistance genotypes were assessed by PCR. The emm genotyping and MLST were performed by DNA sequencing. RESULTS: The emm genotypes and sequence types (STs) were concordant in 143 (85.1%) of 168 EM-resistant GAS strains from Korea. ST36/emm12 (35.1%), ST52/emm28 (22.6%), and ST49/emm75 (16.1%) were the most common types. Most of the ST36 (93.9%) and ST52 (95.8%) strains harbored erm(B), whereas strains ST49, ST42, and ST15 contained mef(A). The concordance between emm genotypes and STs was 41 (93.2%) among 44 EM-resistant GAS strains from Japan. ST36/emm12 (34.1%), ST49/emm75 (18.2%), and ST28/emm1 (15.9%) were the major types. ST36 isolates harbored either erm(B) (56.3%) or mef(A) (37.5%), whereas isolates ST28, ST49, and ST38 carried only mef(A). The proportion of erm(B) and mef(A) was 66.1% and 33.3% in Korea and 22.7% and 68.2% in Japan, respectively. CONCLUSIONS: The common STs in Korea and Japan were ST36 and ST49, whereas ST52 was present only in Korea and ST28 only in Japan. Genotype erm(B) was predominant in Korea, whereas mef(A) was frequent in Japan. There were differences between Korea and Japan regarding the frequencies of emm genotypes, STs, and EM resistance genes among the EM-resistant GAS. The Korean Society for Laboratory Medicine 2016-01 2015-10-26 /pmc/articles/PMC4697353/ /pubmed/26522753 http://dx.doi.org/10.3343/alm.2016.36.1.9 Text en © The Korean Society for Laboratory Medicine. http://creativecommons.org/licenses/by-nc/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Takahashi, Takashi Arai, Kazuaki Lee, Dong-Hyun Koh, Eun-Ha Yoshida, Haruno Yano, Hisakazu Kaku, Mitsuo Kim, Sunjoo Epidemiological Study of Erythromycin-Resistant Streptococcus pyogenes From Korea and Japan by emm Genotyping and Multilocus Sequence Typing |
title | Epidemiological Study of Erythromycin-Resistant Streptococcus pyogenes From Korea and Japan by emm Genotyping and Multilocus Sequence Typing |
title_full | Epidemiological Study of Erythromycin-Resistant Streptococcus pyogenes From Korea and Japan by emm Genotyping and Multilocus Sequence Typing |
title_fullStr | Epidemiological Study of Erythromycin-Resistant Streptococcus pyogenes From Korea and Japan by emm Genotyping and Multilocus Sequence Typing |
title_full_unstemmed | Epidemiological Study of Erythromycin-Resistant Streptococcus pyogenes From Korea and Japan by emm Genotyping and Multilocus Sequence Typing |
title_short | Epidemiological Study of Erythromycin-Resistant Streptococcus pyogenes From Korea and Japan by emm Genotyping and Multilocus Sequence Typing |
title_sort | epidemiological study of erythromycin-resistant streptococcus pyogenes from korea and japan by emm genotyping and multilocus sequence typing |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4697353/ https://www.ncbi.nlm.nih.gov/pubmed/26522753 http://dx.doi.org/10.3343/alm.2016.36.1.9 |
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