Porphyromonas levii - - 牙周病医生的一个恩赐?
Anitha Balaji1, W Jennifer1, Mohanasatheesh Shanmugam1
1Department of Periodontics and Implantology, Sree Balaji Dental College and Hospital, Pallikaranai, Chennai, Tamil Nadu, India.
Journal of pharmacy & bioallied sciences
|June 17, 2024
概括
杆菌被重新归类为 Porphyromonas levii. 这种杆菌被归类为 Porphyromonas levii. 这一分类学修订是在广泛分析之后进行的,证实了它与Porphyromonas属的更密切关系.
科学领域:
- 微生物学 微生物学
- 细菌学 细菌学是一门学科.
- 纳税学是一种分类学.
背景情况:
- Bacteroides属经历了重大的分类学修订,许多物种被重新分配到新的属.
- 杆菌 (Bacteroides levii) 的分类学地位仍然不确定.
- 以前的分类在B. levii.的遗传学位置上造成了模两可.
研究的目的:
- 为了澄清 Bacteroides levii. 的分类学位置.
- 根据全面的分析,确定最适合Bacteroides levii的属.
主要方法:
- 细菌杆菌的生物化学表征.
- 对 Bacteroides levii.的化学分析.
- 进行比较的16S rRNA基因序列分析.
主要成果:
- 细菌杆菌 (Bacteroides levii) 与Porphyromonas属的成员具有很高的相似性.
- 基于16S rRNA序列的遗传学分析支持将其放置在Porphyromonas属内.
- 生物化学和化学特征与Porphyromonas物种更接近.
结论:
- 应该将 Bacteroides levii 重新归类为 Porphyromonas 属. 在 Porphyromonas 属下.
- 该物种现在被正式承认为Porphyromonas levii.
- 这种重新分类解决了分类学上的不确定性,并提高了细菌分类的准确性.
相关概念视频
01:26Bacterial Phylum Proteobacteria
Proteobacteria, one of the largest and most diverse bacterial phyla, encompasses a wide range of Gram-negative bacteria distinguished by their outer membrane composed of lipopolysaccharides. These microorganisms exhibit various metabolic capabilities, including phototrophy, chemolithotrophy, and heterotrophy, and thrive in diverse environments from soil to aquatic systems and host-associated niches. The phylum is divided into six classes: Alphaproteobacteria, Betaproteobacteria,...
01:26Bacterial Phylum Planctomycetes
Planctomycetes are a group of morphologically distinct bacteria predominantly classified into two orders: Planctomycetales and Brocadiales. These gram-negative bacteria exhibit unique features, including division by budding and the presence of stalks or appendages. Their cells are often found in rosette arrangements, and they are notable for possessing an S-layer in their cell envelope, which is relatively uncommon among bacteria. Additionally, Planctomycetes frequently exhibit intracellular...
01:30Bacterial Phylum Spirochaetes
Spirochetes, unique bacteria in the phylum Spirochaetes, are gram-negative, motile, tightly coiled, slender, and flexible. They inhabit aquatic sediments and animals, with some causing diseases like syphilis. Spirochetes are classified into eight genera based on habitat, pathogenicity, phylogeny, and characteristics.Their distinctive motility arises from endoflagella, located within the cell’s periplasm. These endoflagella anchor at the cell poles and extend along the cell length, encased by a...
01:26Bacterial Phylum Bacteroidota
The phylum Bacteroidota includes over 700 species classified into four primary orders: Bacteroidales, Cytophagales, Flavobacteriales, and Sphingobacteriales. These gram-negative, non-sporulating rods exhibit saccharolytic capabilities and can be aerobic or fermentative, encompassing obligate aerobes, facultative aerobes, and obligate anaerobes. Many species display gliding motility, though some are nonmotile or use flagella. The genus Bacteroides is well-studied due to its significant role in...
01:27The Oral Microbiota
The oral microbiome includes a complex ecosystem comprising over 700 microbial species, identified through genomic sequencing and culture-based analyses to date. This community includes a core microbiome, found universally among individuals, and a variable component influenced by environmental factors such as diet, lifestyle, and host genetics. Site-specific conditions, including oxygen gradients, pH levels, and nutrient availability, determine the spatial distribution of these microorganisms...
01:28Development of the Oral Microbiota
The establishment of the oral microbiome begins before birth, challenging the long-held belief that the fetal oral cavity is sterile. The presence of oral microbes such as Streptococcus and Fusobacterium in amniotic fluid suggests that microbial exposure may occur in utero, potentially through translocation from the maternal oral or gastrointestinal tract. This early colonization primes the neonatal immune system and sets the stage for subsequent microbial succession. Maternal health,...