microbio Flashcards
First step of Chain of Infection
Reservoir: where pathogen exists in nature
Second step of Chain of Infection
Transmission to host
Third step of Chain of Infection
Portals of entry
Fourth step of Chain of Infection
Attachment/invasion (susceptible host)
Fifth step of Chain of Infection
Disease/damage (susceptible host)
Sixth step of Chain of Infection
Portals of exit
What are symptoms?
Felt by patient, subjective
Signs of infection?
measurable
Syndrome of infection?
signs/symptoms that are characteristic of a disease
Asymptomatic of infection?
(subclinical), infected person doesn’t exhibit symptoms.
Infectious disease classification?
Caused by a pathogen
Communicable disease classification?
Spread from host to host
Contagious disease classification?
Easily / rapidly spreading
Nosocomial disease classification?
Contracted in a health care setting
Zoonotic disease classification?
Contracted from animal reservoir.
Acute duration of infection?
Rapid onset
Chronic duration of infection?
Prolonged onset, long term
Subacute duration of infection?
intermediate, symptoms appearing weeks after initial infection.
Latent duration of infection?
Inactive periods alternating with outbreaks.
What is Koch’s postulates?
“Scientific method” of pathogen identification.
How to link a pathogen to a certain disease 3rd step?
Cultured organism must cause disease in experimental hosts.
How to link a pathogen to a certain disease 1st step?
Pathogen must be present only in diseased host.