Dhotre Shree V, Mehetre Gajanan T, Dharne Mahesh S, Suryawanshi Namdev M, Nagoba Basavraj S
Department of Microbiology, M.M. Patel Public Charitable Trust's, Ashwini Rural Medical College, Hospital and Research Centre, Kumbhari, Solapur, Maharashtra, India.
FEMS Microbiol Lett. 2014 Aug;357(2):131-5. doi: 10.1111/1574-6968.12519. Epub 2014 Jul 10.
Streptococcus tigurinus is a new member of the Streptococcus viridians group and is closely related to Streptococcus mitis, Streptococcus pneumoniae, Streptococcus pseudopneumoniae, Streptococcus oralis, and Streptococcus infantis. The type strain AZ_3a(T) of S. tigurinus was originally isolated from a patient with infective endocarditis. Accurate identification of S. tigurinus is facilitated only by newer molecular methods like 16S rRNA gene analysis. During the course of study on bacteraemia and infective endocarditis with reference to periodontitis and viridians group of streptococci, a strain of S. tigurinus isolated from subgingival plaque of a patient with periodontitis identified by 16S rRNA gene analysis, which was originally identified as Streptococcus pluranimalium by Vitek 2. Confirmation by 16S rRNA gene analysis showed 99.39% similarity (1476/1485 bp) with S. tigurinus AZ_3a(T) (AORU01000002). To the best of our knowledge, this is the first report of isolation of S. tigurinus from the oral cavity of a periodontitis patient.
蒂氏链球菌是草绿色链球菌群的一个新成员，与缓症链球菌、肺炎链球菌、伪肺炎链球菌、口腔链球菌和婴儿链球菌密切相关。蒂氏链球菌的模式菌株AZ_3a(T)最初是从一名感染性心内膜炎患者中分离出来的。只有通过16S rRNA基因分析等更新的分子方法才能准确鉴定蒂氏链球菌。在参照牙周炎和草绿色链球菌群研究菌血症和感染性心内膜炎的过程中，从一名牙周炎患者的龈下菌斑中分离出一株经16S rRNA基因分析鉴定为蒂氏链球菌的菌株，该菌株最初被Vitek 2鉴定为多动物链球菌。16S rRNA基因分析证实，该菌株与蒂氏链球菌AZ_3a(T)（AORU01000002）的相似度为99.39%（1476/1485 bp）。据我们所知，这是首次从牙周炎患者口腔中分离出蒂氏链球菌的报告。
