摘要
厌氧菌是人、畜体内正常菌群的重要组成部分。人的粪便中99%是厌氧菌。多形类杆菌(Bacteroides thetaiotaomicron)为专性厌氧菌,属脆弱类杆菌组,革兰氏染色阴性,一般为短杆形,两端圆而浓染,中间有不着色部分被认为是其特点,有荚膜,无芽胞,无鞭毛,不能运动。在含糖培养基上菌体呈多形性,有丝状体。多形类杆菌能产生内毒素,在脆弱类杆菌组中的抗原分型为血清型A,因产生β-内酰胺酶能破坏青霉素,故对其耐药。所以,研究多形类杆菌有一定的生物医学意义。
Three strains of B. thetaiotaomicron have been isolated from caeca of BALB/c-nu/+mice of SPF. These Bacteroides are obligately anaerobic, Gram-negative, non-spore-forming and non-motil without flagella rods. A characteristic of staining is deep at ends and stainless at the medium of a rod. The isolation and identification of these strains has been reported in 1987.
This paper introduced only the results of EM observations. Under the SEM, the unstained area of rods is always showing a concavity, which is just a nucleoid in sections under the TEM. Many lamellar corpuscles have been found in cell plasma. Some of them have been secreted out of the cells The chemical properties and physiological functions of them are unknow.
出处
《微生物学报》
CAS
CSCD
北大核心
1989年第2期152-154,共3页
Acta Microbiologica Sinica
