-
sub-acute disease
intermediate
-
chronic
- longer incubation
- disease present longer healing
-
acute
- short incubation:(time of exposure to the onset of 1st symptoms
- disease last short
- either recover fast or die
-
infection
may be subclinical
-
colonization
normal biota (bacterial usually found in all humans)
-
primary disease infection
occurs in healthy individual
-
secondary infection
- infection is follow by some other infection
- ex: Haemophilus influenzae - secondary to influenza
-
latent infection
- persistence of viral genome w/o viral replication
- asymptomatic
-
pathogenesis
- manner in which the disease develops
- (source, transmission, penetrate, and what does it do the host)
-
virulence
- degree of pathogenicity
- virulence factors: capsules, toxins, pill
-
carriers
- having an infectious agent and not showing obvious symptoms (dangerous)
- early stage - incubation
- recovery stage - bacteria & virus can still be contagious
- chronic carriers - ex:Staphylococcus aureus, HBV, HCV
-
reservoirs
- location where virus can replicate
- ex: - humans
- -animals (zoonoses)
- - nonliving (food borne outbreak)
-
vectors
- living organisms that infect and carry diseases
- -mechanical: house flies, cockroaches (carrying on body surfaces)
- -biological : mosquitos, ticks (internally blood meal)
-
overt pathogen
open and observable pathogen
-
opportunistic pathogen
given the right opportunity disease can affect humans
-
nonpathogens
- not associated with infectious diesease
- by any bacterium can cause disease in individual
-
outbreak
result from the introduction of a new virus into an area and are usually confined to a small common population (hepatitis A)
-
epidemic
outbreaks that occur over a large population and geographic area
-
pandemic
- worldwide epidemic
- eg influenza, HIV
-
arbovirus
group of viruses transmitted by arthropod vectors
-
viremia
where virus enters the body and has full asses to the rest of they body
-
permissive tropism
permissiveness of cells for virus replication
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