{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,28]],"date-time":"2026-07-28T15:23:38Z","timestamp":1785252218157,"version":"3.55.0"},"reference-count":49,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2019,9,24]],"date-time":"2019-09-24T00:00:00Z","timestamp":1569283200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["18K10054."],"award-info":[{"award-number":["18K10054."]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Microorganisms"],"abstract":"<jats:p>Staphylococcus argenteus, a novel emerging species within Staphylococcus aureus complex (SAC), has been increasingly reported worldwide. In this study, prevalence of S. argenteus among human clinical isolates, and their clonal diversity and genetic characteristics of virulence factors were investigated in Hokkaido, the northern main island of Japan. During a four-month period starting from March 2019, twenty-four S. argenteus and 4330 S. aureus isolates were recovered from clinical specimens (the ratio of S. argenteus to S. aureus :0.0055). Half of S. argenteus isolates (n = 12) belonged to MLST sequence type (ST) 2250 and its single-locus variant, with staphylocoagulase genotype (coa-) XId, while the remaining isolates were assigned to ST2198\/coa-XIV (n = 6), and ST1223 with a novel coa-XV identified in this study (n = 6). All the isolates were mecA-negative, and susceptible to all the antimicrobials tested, except for an ST2198 isolate with blaZ and an ST2250 isolate with tet(L) showing resistance to ampicillin and tetracyclines, respectively. Common virulence factors in the S. argenteus isolates were staphylococcal enterotoxin (-like) genes sey, selz, sel26, and sel27 in ST2250, selx in ST2198, and enterotoxin gene cluster (egc-1: seg-sei-sem-sen-seo) in ST1223 isolates, in addition to hemolysin genes (hla, hlb, and hld) distributed universally. Elastin binding protein gene (ebpS) and MSCRAMM family adhesin SdrE gene (sdrE) detected in all the isolates showed high sequence identity among them (&gt; 97%), while relatively lower identity to those of S. aureus (78\u201392%). Phylogenetically, ebpS, sdrE, selx, sey, selw, sel26, and sel27 of S. argenteus formed clusters distinct from those of S. aureus, unlike sec, selz, tst-1, and staphylokinase gene (sak). The present study revealed the prevalence of S. argenteus among clinical isolates, and presence of three distinct S. argenteus clones (ST2250; ST2198 and ST1223) harboring different virulence factors in northern Japan. ST2198 S. argenteus, a minor clone (strain BN75-like) that had been rarely reported, was first identified in Japan as human isolates.<\/jats:p>","DOI":"10.3390\/microorganisms7100389","type":"journal-article","created":{"date-parts":[[2019,9,25]],"date-time":"2019-09-25T03:51:18Z","timestamp":1569383478000},"page":"389","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":35,"title":["Molecular Epidemiological Characterization of Staphylococcus argenteus Clinical Isolates in Japan: Identification of Three Clones (ST1223, ST2198, and ST2550) and a Novel Staphylocoagulase Genotype XV"],"prefix":"10.3390","volume":"7","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8402-5349","authenticated-orcid":false,"given":"Meiji Soe","family":"Aung","sequence":"first","affiliation":[{"name":"Department of Hygiene, Sapporo Medical University School of Medicine, Hokkaido, 060-8556 Sapporo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0363-567X","authenticated-orcid":false,"given":"Noriko","family":"Urushibara","sequence":"additional","affiliation":[{"name":"Department of Hygiene, Sapporo Medical University School of Medicine, Hokkaido, 060-8556 Sapporo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mitsuyo","family":"Kawaguchiya","sequence":"additional","affiliation":[{"name":"Department of Hygiene, Sapporo Medical University School of Medicine, Hokkaido, 060-8556 Sapporo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ayako","family":"Sumi","sequence":"additional","affiliation":[{"name":"Department of Hygiene, Sapporo Medical University School of Medicine, Hokkaido, 060-8556 Sapporo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seika","family":"Takahashi","sequence":"additional","affiliation":[{"name":"Sapporo Clinical Laboratory, Inc., Hokkaido, 060-0005 Sapporo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Miyo","family":"Ike","sequence":"additional","affiliation":[{"name":"Sapporo Clinical Laboratory, Inc., Hokkaido, 060-0005 Sapporo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masahiko","family":"Ito","sequence":"additional","affiliation":[{"name":"Sapporo Clinical Laboratory, Inc., Hokkaido, 060-0005 Sapporo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Satoshi","family":"Habadera","sequence":"additional","affiliation":[{"name":"Sapporo Clinical Laboratory, Inc., Hokkaido, 060-0005 Sapporo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nobumichi","family":"Kobayashi","sequence":"additional","affiliation":[{"name":"Department of Hygiene, Sapporo Medical University School of Medicine, Hokkaido, 060-8556 Sapporo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2019,9,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"15","DOI":"10.1099\/ijs.0.062752-0","article-title":"Novel staphylococcal species that form part of a Staphylococcus aureus-related complex: The non-pigmented Staphylococcus argenteus sp. nov. and the non-human primate-associated Staphylococcus schweitzeri sp. nov","volume":"65","author":"Tong","year":"2015","journal-title":"Int. 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