Week 3- Infection Flashcards
Vertical Transmission
Mother to fetus
Direct (Horizontal transmission)
Sneezing, coughing, etc.
Indirect transmission
blow nose, tissue put on table, someone touches table and gets sick
Zoonotic transmission
Transferred from animals
Initial exposure to onset of first symptoms (hours to years) is what stage of infection
Incubation
Occurrence of initial S/S (often mild) is what stage of infection
Prodromal
Progression, affects other body tissues is what stage of infection
Invasion
-Recovery occurs and S/S decrease
-OR Disease is fatal
-OR period of latency
is what stage of infection
Convalescence
True pathogens
Bypass normal defenses and cause infection
Tropism is when
Microorganisms are attracted to specific types of cell, tissue, or host
Mutation within organism where it morphs into something else and is better able to cause disease is
Antigenic Drift
Infection spreads to different type of organism is
Antigenic Shift
Endotoxins are produced
In walls of Gram - bacteria (v dangerous)
Exotoxins are a byproduct of
cellular metabolism
The capacity of a pathogen to cause disease is
Pathogenicity
Ability of disease to spread from person to person
Communicability
Ability of disease to produce an immune response
Immunogenicity
Ability to invade and multiply in host
Infectivity
How microorganisms damage tissue
mechanism of action
Routes microorganisms take
Portal of entry
Production of toxins
Toxigenicity
Capacity to cause severe disease/potency
Virulence
Disease w/ relatively high but constant rates of infection within a particular population
Edemenic
Number of new infex in a particular pop. that greatly exceeds the # usually observed
Epidemic
