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DANB's NYI (NYI) Practice Tests & Test Prep by Exam Edge

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DANB's New York Infection Control Sample Test

1 of 5

A patient has been stricken with dental disease because of bacteria. Bacteria is considered what type of infectious agent?

Correct Answer:

biological.
bacteria, which are responsible for the dental disease in the patient mentioned, are classified as a biological agent. biological agents are one of the three main categories of infectious agents, alongside chemical and physical agents.

biological agents include all living organisms that can cause infections in humans. this category not only includes bacteria but also viruses, fungi, and protozoa. each of these organisms can invade the human body, reproduce, and cause various diseases. in the context of the question, the bacteria causing dental disease are acting as pathogens, organisms that can cause disease in their host.

chemical agents, on the other hand, refer to non-living substances that can cause harm when introduced into the body. these agents can include industrial chemicals, pesticides, and even medications that can have toxic effects under certain conditions. unlike biological agents, chemical agents do not reproduce within the host but can cause damage through chemical interactions at the cellular level.

physical agents encompass environmental factors that can lead to disease or injury. these include excessive noise, ultraviolet light, radiation, and extreme temperatures. these agents do not involve living organisms or chemical reactions, but they can still significantly impact health by disrupting bodily functions or causing physical damage.

in summary, when considering agents that can cause infection or disease, it's crucial to differentiate among biological, chemical, and physical agents. in the case of the patient with dental disease, the causative agent is biological, specifically bacteria, which are capable of infecting and causing harm to human tissues. understanding the nature of these agents helps in diagnosing, treating, and preventing various health conditions.