Which term describes the pathway for pathogens to leave the reservoir?

• A. Airborne Transmission
• B. Casual Transmission
• C. Foodborne Transmission
• D. Portal of Exit

Answer: (D)

Pathogens leave their reservoir through a specific exit pathway, and that exit route is called the portal of exit. This term identifies exactly how an infectious agent leaves the source to reach a new host. For example, it can leave via the respiratory tract when someone coughs or sneezes, through the gastrointestinal tract with feces or vomitus, via urine, blood from a wound, or through breaks in the skin. Understanding this exit point helps explain why and how infections spread from one person or place to another. The other terms describe how the pathogen may move after it has exited (such as traveling through the air or contaminating food), or are not formal terms for an exit pathway, so they don’t specify the route by which the reservoir is cleared of the pathogen.