一、选择个体( Select cases) 筛选某些符合特定条件的个体Data/ Select

一、定量资料( quantitative data):数值变量(numerical variable) 其变量的值是定量的,表现为数值的大小,一般有度量衡

一、统计分析菜单 二、均数比较子菜单

SPSS10界面介绍 (Statistical Products and Services Solutions) 一、窗口类型介绍 二、主界面菜单介绍 三、对话框介绍 四、SPSS系统设置

Genera of picornaviruses Enterovirus Polio Diseases of the human (and other alimentary tract Coxsackie a and B (e.g. polio virus

Category of sample Blood, Urine, Stool, nasal washing, nasal swab, throat swab, saliva, sputum, rectal swab, vesicle fluid scraping or swab) tissue, brain biopsy, cerebrospinal fluid, et

What does a pathogen have to do? Infect (infest) a host Reproduce(replicate) itself Ensure that its progeny are transmitted to another host

Medical Virology Dept. of Medical Microbiology and Parasitology Shanghai Second Medical University Shanghai, China. E.mail:(xkguoshsmu.edu.cn)

Biological Features Structure and chemical composition Developmental cycle Staining properties Antigens Growth and metabolism Characteristics of host-parasite- relationship Classification

Mycoplasmas a group of the smallest organisms that can be free living in nature, Pass bacterial filter and also grow on laboratory media. More than 80 species, belong to Mycoplasmatales of mollicute. 3 families can be divided: