Question

Blake is writing about the chain of infection for his biology class. Which would be the BEST example?

A.
“I once left potato salad outside of the refrigerator overnight and had to throw it away in the morning.”

B.
“I once got very sick from sitting next to a lady at the park who was coughing.”

C.
“I once got a sunburn from sitting outside for too long without sunscreen.”

D.
“My cat once had to get stitches after getting in a fight with another cat.”

Answer 1

The best example of the chain of infection from the given options is B. "I once got very sick from sitting next to a lady at the park who was coughing."

Step-by-step explanation:

The chain of infection refers to the process through which infections are transmitted from one person to another. It typically involves a series of events or links that must be present for an infection to occur. These links include:

1. Infectious agent: The coughing lady in this example represents the infectious agent, as she was likely carrying a respiratory infection that can spread through respiratory droplets.

2. Reservoir: The coughing lady's respiratory system serves as the reservoir, where the infectious agent is harbored and can be transmitted to others.

3. Portal of exit: When the coughing lady coughs, she releases respiratory droplets containing the infectious agent, which act as the portal of exit.

4. Mode of transmission: In this case, the mode of transmission is direct contact, as the person writing the example got sick from sitting next to the coughing lady.

5. Portal of entry: The person's respiratory system is the portal of entry, as they inhale the respiratory droplets containing the infectious agent.

6. Susceptible host: The person who got sick from sitting next to the coughing lady represents the susceptible host, as they were susceptible to contracting the infection.

This example demonstrates how the chain of infection can be initiated by an infectious agent, transmitted through direct contact, and result in illness in a susceptible host. It illustrates the importance of taking precautions to prevent the spread of infections, such as covering the mouth while coughing and practicing good respiratory hygiene.

ur welcome ;3

Answer 2

B.
A isn’t the answer because that doesn’t have anything to do with infection or disease. C isn’t the answer because a sun burn is more of a chemical reaction within your body which doesn’t have pathogens. D has to do with dominance within the animal kingdom, not infectious diseases.