文档介绍：Chapter 7 Bacterial Infection and immunity
Basic terms
Bacterial infection(细菌的感染)
Pathogen(病原菌)
Nonpathogen (非病原菌)
Opportunistic pathogen(机会致病菌)
Bacterial Infection
细菌的感染
The process of bacteria invading in the body, growing in the tissues, producing toxins and causing diseases is called bacterial infection.
Pathogen(病原菌)
Pathogenic bacterium (致病菌)
The bacterium which can cause a disease is called pathogen.
Nonpathogen(非病原菌)
Nonpathogenic bacterium(非致病菌)
A bacterium that does not cause disease is called nonpathogen.
Opportunistic pathogen(机会致病菌)
Conditioned pathogen(条件致病菌)
Some bacteria are capable of causing diseases only under certain conditions.
anisms can cause disease only if one or more of the usual defence mechanisms humans have evolved to restrict anisms from their usually sterile ans and tissue are breached by accident, by intent (. surgery), or by an underlying metabolic or an infectious disorder (. AIDS).
Outline
Normal flora and opportunistic pathogen
Bacterial pathogenesis
The host immune defence system
The initiation and course of infection
Hospital infection
Section 1 Normal flora and opportunistic pathogen
★ Normal flora(正常菌群)
Normal microbial flora(正常微生物群)
The population of anisms that inhabit the skin and mucous membranes of healthy persons. They are usually harmless, some even beneficial, to human’s health.
Locations
Surface tissues of skin
Oral cavity
Respiratory tract
Gastrointestinal tract
Genitourinary tract
Normal flora on intestinal mucosa