A nurse is caring for a client who acquired hepatitis A from consuming contaminated food. The client’s mouth is an example of which of the following links in the chain of infection?
A.
Portal of entry
B.
Infectious agent
C.
Susceptible host
D.
Reservoir
The correct answer and Explanation is :
The correct answer is A. Portal of entry.
Explanation:
In the chain of infection, the “portal of entry” is the pathway through which an infectious agent enters a new host. In the case of hepatitis A, which is a viral infection transmitted through contaminated food or water, the mouth serves as the portal of entry for the virus. Here’s a breakdown of the chain of infection to clarify:
- Infectious Agent: This is the pathogen causing the disease. For hepatitis A, the infectious agent is the hepatitis A virus (HAV).
- Reservoir: This is the natural habitat where the pathogen lives, grows, and multiplies. For hepatitis A, the reservoir can be humans (often asymptomatic carriers), contaminated food, and water sources.
- Portal of Exit: This is the route by which the pathogen leaves the reservoir. For hepatitis A, this could be through feces of an infected person, which can contaminate food and water.
- Mode of Transmission: This describes how the pathogen is transferred from one host to another. In the case of hepatitis A, the transmission occurs primarily through the fecal-oral route, meaning contaminated food or water is ingested by a new host.
- Portal of Entry: This is the site where the pathogen enters a new host. For hepatitis A, the mouth is the portal of entry because the virus is ingested through contaminated food or water.
- Susceptible Host: This refers to a person who is at risk of contracting the disease due to various factors, such as lack of immunity or poor health.
In summary, when a person consumes contaminated food, the mouth is the entry point for the hepatitis A virus into the digestive system. Thus, in this context, the mouth is best categorized as the “portal of entry” in the chain of infection.