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Qatar Council for HealthCare Practitoners Nurse Sample Test

1 of 5

Which of the following is defined as an organism that can cause disease?

Correct Answer:

infectious agent.

the correct answer to the question "which of the following is defined as an organism that can cause disease?" is "infectious agent." an infectious agent is a biological entity capable of causing disease or illness to its host. this can include entities such as bacteria, viruses, fungi, or parasites. these agents can invade the body, evade the immune system, reproduce, and cause various harmful effects, leading to diseases.

the other options listed—mode of transmission, vre (vancomycin-resistant enterococcus), and particulate respirator—are related to infection but do not fit the definition of an organism that can cause disease. "mode of transmission" refers to the mechanism by which an infectious agent is spread or transferred from one host to another or from the environment to a host. this could be through direct contact, airborne particles, bodily fluids, or contaminated surfaces.

vre is an example of a specific infectious agent, specifically a type of bacteria that has developed resistance to the antibiotic vancomycin. while vre itself is an infectious agent, the term on its own in this context refers to a particular characteristic of some bacteria, not to the general category of disease-causing organisms.

a particulate respirator is a type of personal protective equipment (ppe) used primarily in healthcare settings to prevent the inhalation of infectious particles in the air. this device is crucial for protecting healthcare workers from airborne pathogens but is not an organism and thus cannot be considered an infectious agent capable of causing disease.

in summary, among the options provided, only "infectious agent" accurately describes an organism that can cause disease, fulfilling the query posed by the original question. the other terms relate to different aspects of infection and disease control but do not define organisms that cause diseases.