Portal of exit

Definition

A portal of exit is the site through which a pathogen leaves its host to infect another host. Common portals include respiratory tract, gastrointestinal tract, and skin.

5 Must Know Facts For Your Next Test

1. Portals of exit are critical for the transmission of infectious agents from one host to another.
2. Respiratory droplets are a common mechanism for pathogens exiting via the respiratory tract.
3. Gastrointestinal pathogens often exit through feces, leading to transmission through contaminated food or water.
4. Skin lesions and blood can act as portals of exit for certain pathogens like HIV and hepatitis B.
5. Understanding portals of exit can aid in developing strategies to prevent the spread of infections.

Review Questions

Related terms

Portal of Entry: The site at which a pathogen enters a new host.

Transmission:

The mechanism by which a pathogen is spread from one host to another.

Reservoir:

Any person, animal, plant, soil or substance in which an infectious agent normally lives and multiplies.