摘要
牙周病是人类的一种常见病、多发病,其致病菌具有多样性和复杂性,有关该病的致病菌和病因学的研究,对防治工作具有重要意义。作者从牙周病患者的病灶处分离到了一株细菌(90-1),并对其进行了鉴定,现将结果报告如下。
A strain, No. 90-1, is isolated from the oral cavity of a patient with periodontophthy. This strain is a Gram-positive, non-endospore-forming, facultative anaerobe with spherical cells, 0.9- 1.5μm in diameter, occuring in pairs and seldom in short chains of four cells, and motile by one flagellum per cell. The optimum growing temperature is 35-37℃, appreciable growth is not found below 10℃, but growth at 53℃ and toleranct to 60℃ for 30min. This strain is microhalophilous and grows best, well and poorly in the medium containing 2%, 10%-15% and 25%NaCl respectively. Catalase and urease are positive and nitrate is reduced. Acid is produced from many carbohydrates, but no gas. Gelatin can be hydrolyzed, but starch, cellulose and dextrin do not. G+C content in DNA is 41.34mol%(Tm). The strain(90-1) is considered to be a new species belonging to a new genus because its some characteristics are different from those of the known coccus genuera and designated as Stomatostreptococcus microhalophilus Ping, Zhou, Sun et Fan gen. nov. sp. nov.according to its source and microhalophilic trait.
出处
《微生物学报》
CAS
CSCD
北大核心
1998年第2期146-151,共6页
Acta Microbiologica Sinica
关键词
口腔链球菌属
微嗜盐
口腔链球菌
牙周病
Stomatostreptococcus, Stomatostreptococcus microhalophilus, Periodontophthy