Question

Which stage is missing from the chain of infection: Infectious Disease, Reservoir, Portal of Exit, ________, Portal of Entry, Susceptible Host.

A. Mode of Entry
B. Mode of Transmission
C. Route of Entry
D. Route of Transmission

Answer 1

"A. Mode of entry" Every disease or infection needs a mode of entry.

Answer 2

B. Mode of Transmission

Step-by-step explanation:

The mode of transmission is when the pathogen is transmitted either directly or indirectly. Direct transmission, requires close association with the infected host. Indirect transmission, requires a vector, such as an animal or insect. The method of transmission, starts on pathogens from a reservoir to a susceptible host. Once the pathogen has exit the reservoir, it needs a mode of transmission to the host through a portal of entry. Once it enters, the host becomes susceptible to the pathogen.