Pathogenesis of Infectious Diseases Flashcards
The prefix “path” refers to
disease
Four Periods or Phases in the Course of an
Infectious Disease
The incubation period
* The prodromal period
* The period of illness
* The convalescent period
An infectious disease is a disease caused by a microbe,
and the microbes that cause infectious diseases are
collectively referred to as
pathogens
Once an infectious process is initiated, the disease
may remain localized or it may spread; examples of
localized infections are pimples, boils, and abscesses
Localized infections
When the infection spreads throughout the body, it is
said to have become a
systemic
is one that comes on more suddenly
than a chronic disease, but less suddenly than an acute
disease; an example would be bacterial endocarditis.
subacute disease
s defined as some evidence of a
disease that is experienced by the patientsomething
that is subjective;
symptom of a disease
are
infectious diseases that go
from being symptomatic to
asymptomatic, and then,
later, go back to being
symptomatic
Latent infections
One infectious disease may commonly follow another; in
such cases, the first disease is referred to as a __ and the second disease is referred to as a
primary
infection
secondary infection
Steps in the Pathogenesis of Infectious
Diseases
- Entry of the pathogen into the body
- Attachment of the pathogen to some tissue(s) within
the body - Multiplication of the pathogen
- Invasion or spread of the pathogen
- Evasion of host defenses
- Damage to host tissue(s)
____ are capable of causing disease;
_____ are not.
Virulent strains
avirulent strains
Pathogens that must live within host cells in order to
survive and multiply are referred to as
obligate
intracellular pathogens
are capable of both an
intracellular and extracellular existence.
Facultative intracellular pathogens
