The organism that causes an infection is called the:

The organism that causes an infection is referred to as the causative agent. This term encompasses any pathogen, including bacteria, viruses, fungi, or parasites, that can lead to disease. Understanding this concept is crucial in the field of healthcare, particularly for CNAs, as it helps in identifying and managing infections effectively.

The causative agent is the initial link in the chain of infection, leading to the subsequent stages that involve the reservoir (where the agent lives), the portal of entry (how the agent enters a new host), and the susceptible host (an individual who can become infected). Recognizing the role of the causative agent is essential for infection control practices, as it informs measures that can be taken to prevent the spread of infections.