Monday, 17 August 2020

Classification of Infections

Primary Infection- initial infection with a parasite in the host
Reinfection- subsequent infection by the same parasite
Secondary Infection- a new parasite infecting an IC host
Focal infection- infection at a localized site 
Cross infection- new infection est. From another host in a pt already suffering from ds
Nosocomial infections- HIC
Iatrogenic infection- through any therapeutic procedure

Causing an Infection

The endogenous – disease originates within the body.  Ex: metabolic disorders, congenital abnormalities, tumors.
The exogenous – disease originates outside the body.  Ex: chemical agents, electrical shock, trauma.
Nosocomial – acquired by an individual in a health care facility (workers to a patient). Many are antibiotic-resistant, life-threatening.
Opportunistic – occur when the body’s defenses are weak. Ex: pneumonia w/AIDs.

Source of Infection

  • Humans from pt or carrier
  • A healthy carrier
  • Convalescent carrier
  • Temporary carrier
  • Contact carrier
  • Paradoxical carrier
  • Animals
  • Insects vectors
  • Mechanical vector
  • Biological vector
  • Soil and water 
  • Food

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