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所在平台: Udemy |
课程主页: https://www.udemy.com/course/basics-of-microbiology-r/
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课程名称：微生物学基础 课程概述：本课程主要介绍细菌的定义、形态分类及其应用。细菌是单细胞、自由生活的微小生物，能够执行生命的基本功能，含有DNA和RNA。它们的直径范围为0.2到2.0微米，长度为2-8微米，广泛存在于空气、水、土壤、食品及所有自然环境中。课程中将使用电子显微镜清晰观察细菌的内部结构。 细菌的形态分类包括： - 球菌（Cocci）：这些细菌为单细胞，呈球形或椭圆形。 - 杆菌（Bacilli）：杆状或圆柱形细菌，通常单独存在或成对，如蜡样芽孢杆菌（Bacillus cereus）。 - 弯曲菌（Vibro）：呈弯曲的逗号形状，例如霍乱弧菌（Vibrio cholerae）。 - 螺旋菌（Spirilla）：螺旋形有多个弯曲和末端鞭毛，例如大螺旋菌（Spirillum volutans）。 - 螺旋体（Spirochetes）：细长、柔韧的螺旋形态（如梅毒螺旋体Treponema）。 - 放线菌（Actinomycetes）：分枝的丝状细菌，形态由坚硬的细胞壁决定。 - 微小生物（Mycoplasmas）：缺乏细胞壁的细菌，因此形态不稳定，通常呈圆形或椭圆形。 根据细菌的排列方式，可以分为： - 单球菌（Monococcus）：又称微球菌，以单个独立的圆形细胞出现，如黄微球菌（Micrococcus flavus）。 - 双球菌（Diplococcus）：细胞在某一平面上分裂后仍然相互连接，如肺炎双球菌（Diplococcus pneumonia）。 - 链球菌（Streptococcus）：细胞在一个平面上重复分裂形成细胞链，如化脓性链球菌（Streptococcus pyogenes）。 - 四联球菌（Tetracoccus）：由四个圆细胞组成，在两个相互垂直的平面上分裂。 - 僧帽菌（Sarcina）：细胞在三个平面上分裂，形成立方体状的配置，通常由八或十六个细胞构成，如黄僧帽菌（Sarcina lutea）。 细菌的应用包括：酶、疫苗及灭菌产品的生产，疾病诊断与治疗，工业废物处理，灭菌，消毒剂评估，以及抗生素的微生物检测等。 课程大纲：无。
In this student will able to learn definition of bacteria, morphological classification of bacteria, applications of Bacteria. as we all know Bacteria are unicellular , free living , microscopic microorganisms capable of performing essential functions of life. They contain both DNA and RNA. They range from 0.2 to 2.0 um in diameter and 2-8 um in length. They are present in air, water ,soil. Food and all natural environment. An electron microscope is used for clear visualisation of internal structures of the bacteria.Morphological classification of bacteria- Cocci: These types of bacteria are unicellular, spherical or elliptical shape. Bacilli: - These are rod shaped or cylindrical bacteria which either remain singly or in pairs. Example: -Bacillus cereus.Vibro: - The vibro are the curved, comma shaped bacteria and represented by a single genus. Example: - Vibro cholerae. Spirilla: - These type of bacteria are spiral or spring like with multiple curvature and terminal flagella. Example: -Spirillum volutans. Spirochetes: slender,flexious,spiral forms (Treponema). Actinomycetes: branching filamentous bacteria. The shape is due to rigid cell wall.Mycoplasmas: They are cell wall deficient bacteria and hence do not possess stable morphology. They occur in round or oval bodies with interlacing filaments.On the basis of arrangement of bacterial cell:Monococcus:- they are also called micrococcus and represented by single, discrete round Example: Micrococcus flavus.Diplococcus:- the cell of the Diplococcus divides ones in a particular plane and after division, the cells remain attached to each other. Example: Diplococcus pneumonia.Streptococcus: - here the cells divide repeatedly in one plane to form chain of cells. Example: - Streptococcus pyogenes.Tetracoccus: - this consists of four round cells, which defied in two planes at a right angles to one another. Example: - Gaffkya tetragena.Sarcina: -in this case the cells divide in three planes but they form a cube like configuration consisting of eight or sixteen cells but they have a regular shape. Example: -Sarcina lutea.Applications of Bacteria- Production of enzymes, vaccines, sterilized product, Diagnosis of disease and treatment, Treatment of industrial waste material, Sterilization, Evaluation of disinfectant, Microbiological assays of antibiotics.
