Question 47

Disease from microbial invasion is called infection.

Infection refers to the invasion and multiplication of microorganisms in the body, which can lead to disease. This term encompasses various pathogens, including bacteria, viruses, fungi, and parasites that can cause harm to the host.

A) infection.

This option is correct as it specifically denotes the process by which microorganisms invade and multiply within a host, resulting in disease. Infection can manifest in various forms, depending on the type of microorganism involved and the immune response of the host.

B) reservoir.

Reservoir refers to the natural habitat where a pathogen lives and multiplies, which does not directly indicate disease from microbial invasion. While reservoirs are crucial in the lifecycle of pathogens, they do not define the condition of disease that arises from infection.

C) source.

A source is the origin of an infection, which can be a person, animal, or environment from which the pathogen is transmitted. However, it does not imply the actual process of disease caused by microbial invasion, making it an incorrect choice in this context.

D) susceptible host.

A susceptible host is an individual who is vulnerable to infection due to weakened immunity or other factors. While this term relates to the ability of a pathogen to cause disease, it does not identify the disease itself, thus making it an unsuitable answer.

Conclusion

Infection is the precise term used to describe disease resulting from microbial invasion, distinguishing it clearly from the other options presented. The terms reservoir, source, and susceptible host relate to the broader context of infectious diseases but do not define the disease process itself. Therefore, infection is the definitive answer to the question posed.