Microbe Attributes

Infectivity
1)Entrance
2)Establishment
3)Portal of exit
4)Transmission mechanism
Entrance (Infectivity)
portal of entry
Establishment (Infectivity)
Multiplication
Factors involved in establishment
1)suitable environment
2)resist host defense
3)produce metabolic products harmful to host
portal of exit
How the organism gets out
Transmission mechanism (infectivity)
How the organism spreads
Modes of infection
1) invasive
2) non-invasive
invasive
Organism moves around
non-invasive
organism doesn’t move but the products it produces does.
Pathogenicity
ability to produce a disease
Virulence
degree of pathogenicity
Factors of virulence
morphological features (capsules, pili, etc.)
Capsule
effects phagocytosis
pili
allows an organism to attach
Categories: Microbiology