The portal of exit for most respiratory infections is feces and urine.

• A. Through the blood
• B. Through the skin
• C. True
• D. False

Answer: (D)

When thinking about how respiratory infections spread, the normal route for the infectious agent to leave the body is through the respiratory tract—coughing, sneezing, talking, and nasal or throat secretions. Those droplets and aerosols can carry pathogens directly to another person’s mucous membranes or contaminate hands and surfaces that others touch.

Feces and urine are typical portals of exit for infections that affect the GI tract or urinary tract. They’re not the main exit routes for most respiratory pathogens. While some viruses can be detected in stool or other fluids, that shedding does not represent the common or primary way respiratory infections spread.

So the statement is not correct; the usual portal of exit for respiratory infections is the respiratory tract, not feces and urine.