Question

What is the correct order of the steps in the chain of infection, after the presence of a microorganism, but before it gets to the susceptible host?

1) Method of transmission
2) Reservoir
3) Portal of entry
4) Portal of exit

Answer 1

The correct order of the steps in the chain of infection, after the presence of a microorganism but before it gets to the susceptible host, is portal of exit, method of transmission, portal of entry, and reservoir.

Step-by-step explanation:

The correct order of the steps in the chain of infection, after the presence of a microorganism but before it gets to the susceptible host, is as follows:

1. Portal of exit: This is the point where the microorganism leaves the host's body. It can be through coughing, sneezing, or other methods.
2. Method of transmission: This is how the microorganism is transmitted from one host to another. It can be through direct contact, airborne droplets, or contaminated objects.
3. Portal of entry: This is the point where the microorganism enters the new host's body. It can be through the respiratory tract, gastrointestinal tract, or breaks in the skin.
4. Reservoir: This is the source or habitat where the microorganism lives and grows. It can be humans, animals, or the environment.

Following these steps, the microorganism can then infect the susceptible host and cause disease.