What term identifies the portal through which an organism enters a host?

What term identifies the portal through which an organism enters a host?

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

Answer: (A)

Portal of entry identifies the route a pathogen uses to invade a host. It covers entry through mucous membranes or skin—such as inhalation into the respiratory tract, ingestion into the gut, or penetration through broken skin. This is distinct from the portal of exit, which is how the organism leaves the host (for example, by coughing or shedding in feces). It’s also separate from means of transmission, which describes how the pathogen moves between hosts (direct contact, droplets, airborne, vectors), and from the reservoir, where the organism normally lives. So, the term that identifies the path by which an organism enters a host is portal of entry.

Portal of entry identifies the route a pathogen uses to invade a host. It covers entry through mucous membranes or skin—such as inhalation into the respiratory tract, ingestion into the gut, or penetration through broken skin. This is distinct from the portal of exit, which is how the organism leaves the host (for example, by coughing or shedding in feces). It’s also separate from means of transmission, which describes how the pathogen moves between hosts (direct contact, droplets, airborne, vectors), and from the reservoir, where the organism normally lives. So, the term that identifies the path by which an organism enters a host is portal of entry.