Infectious Agent: Tuberculosis (TB)

Reservoirs: Humans.

Portals of Exit: Excretion of respiratory secretions. ie. sneezing, coughing, talking, singing.

Modes of Transmission: Airborne. When the pathogen is suspended in the air and another person breaths it into their respiratory system.

Portals of Entry: The TB bacteria enters the human through the respiratory system ie. inhalation of the pathogen.

Susceptible Host: Any human exposed to TB through suspended airborne bacteria. However there are populations at higher risk such as those who are immunocompromised.