What is the term for the point of escape for the organism?

• A. Portal of Exit
• B. Reservoir
• C. Portal of Entry
• D. Means of Transmission

Answer: (A)

Pathogens have to leave a host to spread to others, and the spot where they exit is the portal of exit. This is the anatomical or physical route through which the organism leaves the body, such as coughing or sneezing from the respiratory tract, excretion via the gastrointestinal tract, drainage from a skin lesion, or blood from a wound. It’s distinct from the portal of entry, which is where a new host takes in the pathogen; it’s also different from the reservoir, where the organism resides when not inside a host, and from means of transmission, which describes how the pathogen moves between hosts (airborne, contact, vector, etc.).