Pathogenic Mechanisms Flashcards
1
Q
What is pathogenicity
A
The ability of an infectious agent to cause disease
2
Q
What are the requirements for pathogenicity
A
1.Transmissibility
2.Infectivity
3.Invasiveness
4.virulence
3
Q
What is transmissibility
A
Ability to transfer from one host to a new host
4
Q
What is infectivity
A
Ability to breach the new hosts defence
5
Q
What is invasiveness
A
Spread of microorganisms from the site of infection to other parts of the body
6
Q
Different ways of invasiveness
A
Direct extension
Lymphatics
Blood stream
Nerves
7
Q
What is direct extension
A
Spread from an adjacent wound or infection
8
Q
What are the lymphatics
A
Lymphatics vessels
Lymph nodes
Thoracic duct
