|
第一章 病毒学基础 |
|
|
|
|
|
第一节. 病毒的形态结构 (Viral Morphology and Structure) |
|
|
|
|
|
A virion is a complete, fully developed, infectious viral particle composed of nucleic acid and surrounded by a protein coat that protects it from the environment and is a vehicle of transmission from one host cell to another. |
|
|
病毒粒子（virion）:成熟的具有侵染力的单个病毒颗粒。 |
|||
|
Virus particles (virions) vary widely in shape: different viruses have different shapes. There are two primary shapes of viruses: rod (filamentous, helical symmetry) and spherical (polyhedral, many-sided).
|
|||
| 下面是各种病毒的图像： | |||
|
|
|
|
|
|
1.病毒形态示意图 |
2.fd噬菌题 |
3.流感病毒 |
|
|
|
|
|
5.芜菁病毒 |
6.烟草花叶病毒TMV |
7.P2噬菌体 |
|
|
|
|
8 腺病毒 |
|
|
|
|
| （一）.病毒的大小(Viral size) |
 |
||||
|
病毒形态极其微小，研究方法有： |
|||||
|
|
研 |
 |
电子显微镜观测 |
||
|
Virions rang in size from 10 to 300 or 400 nm in diameters
and 20 to 14,000 nm in length. Most viruses are too small to be visible
in the light microscope and must be viewed with the electron microscope.
|
|
|
病毒测量的表示单位：nm ; 1nm = 10-3 mm
= 10-6mm; |
|
nm
nanometer毫微米,纳米); |
|||
| 病毒之最： | |||
|
最大 |
虫痘病毒 450nm |
||
|
最长 |
甜菜黄花病毒 1250x10nm |
||
|
最小 |
菜豆畸矮病毒 9～11nm |
||
|
最细 |
E.coli f1噬菌体 5x800nm | ||
|
diameter[dai5AmitE]n.直径 |
| |
 |
||
|
|
|||
