4.3 Routes of Exposure

Unlike chemical and physical agents where "safe" doses are specified in technical literature, no such assignment has been made to biohazardous agents.  Thus, controlling exposures to these agents becomes the greatest task in the prevention of subsequent infections.  In order to accomplish this goal, it is necessary to understand the routes by which exposure to these agents occurs.  The most common routes are: 

  • respiratory (from the generation of aerosols) 
  • contact 
  • oral (ingestion) 
  • ocular (mucous membrane) 
  • inoculation (parenteral)