Pathogenesis of Infection L4 Flashcards
Saprophytes live on
Dead or decaying organic matter
Parasites are free living microorganisms
(T/F)
False
Where are saprophytes found?
They are found in soil and water
Which kind of microorganisms are of little relevance in infectious disease
Saprophytes
Microbes that can establish themselves and multiply in the hosts are
Parasites
Parasites may be either …… or ……
pathogens or commensal
The ability of a pathogen to cause disease is called
pathogenicity
Pathogens are divided in two types
True/primary
Opportunists
Capable of producing disease in previously healthy individuals with intact immunological defenses
True/Primary Pathogens
These bacteria are able to cause disease only when such defenses are impaired or compromised
Opportunist Pathogens
In which the typical or characteristic clinical
manifestations of the particular infectious disease are not present
Atypical infection
The organism remains in the tissues in a hidden form proliferate and produce clinical disease when the host resistance is lowered
Latent infection
Bacteria circulate and multiply in the blood, form toxic products and cause high fever
Septicemia
A condition where pyogenic bacteria produce septicemia with multiple abscesses in internal organs such as the
spleen, liver and kidney
Pyemia
Types of carriers?
Convalescent
Healty
Incubatory
Temporary
Chronic
A healthy carrier is an individual who harbors the pathogen but is not ill
Healthy carrier
An individual who is incubating the pathogen in large numbers but is not yet ill
Incubatory carrier
An individual who has recovered from the infectious disease but continues to harbor large numbers of pathogen
Convalescent carrier
Reservoir of infections
Human (case/carrier)
Animal
Insects
Soil and water
Food
Modes of Transmission of Infection
Contact (direct/Indirect)
Inhalation/Droplets/Respiratory
Ingestion
Inoculation
Insects
Congenital
Iatrogenic and Laboratory Infections