24. Links in the chain-of-infection include causative agent, reservoir, portal of exit, mode of transmission, portal of entry, and:
Answer: C
Susceptible host
The chain of infection includes the susceptible host as a critical component, which refers to individuals who are vulnerable to infection due to various factors such as immunity or health status.
A) rejective host
This term is not recognized in the context of the chain of infection. It does not correspond to any established concept related to infection transmission or susceptibility, making it an incorrect option.
B) mode of infection
While the mode of infection is relevant to understanding how infections spread, it is not one of the key links in the chain of infection. Thus, this option does not accurately complete the chain as specified in the question.
C) susceptible host
This option is correct as the susceptible host is a vital part of the chain of infection. It represents the final link, indicating those individuals who can contract the disease if exposed to the causative agent, thereby completing the cycle of infection.
D) portal of holding
This term is not applicable within the context of the chain of infection. It does not represent a standard concept used to describe any of the links involved in infection transmission, leading to its incorrect classification.
Conclusion
The susceptible host is essential in the chain of infection, as it identifies those at risk of contracting diseases. The other options fail to provide valid components of this chain, as they do not align with established terminologies or concepts related to infection transmission.