Which term denotes the agent that causes a disease, not the disease itself?

Which term denotes the agent that causes a disease, not the disease itself?

• A. Pathogens
• B. Reservoir
• C. Causative Agent
• D. Chain of Infection

Answer: (C)

The key idea is naming the cause, not the illness itself. The term that designates the factor responsible for starting a disease is the causative agent. This label is used to refer to whatever triggers the disease—often a living organism like a bacterium or virus, but the emphasis is on the cause itself, not the disease name. Pathogens are disease-causing organisms, which is related, but the question points to the generic label for the cause, which is causative agent. A reservoir is where the agent lives, and the chain of infection outlines how disease spreads, so those terms describe other aspects of disease dynamics rather than the cause itself.

The key idea is naming the cause, not the illness itself. The term that designates the factor responsible for starting a disease is the causative agent. This label is used to refer to whatever triggers the disease—often a living organism like a bacterium or virus, but the emphasis is on the cause itself, not the disease name. Pathogens are disease-causing organisms, which is related, but the question points to the generic label for the cause, which is causative agent. A reservoir is where the agent lives, and the chain of infection outlines how disease spreads, so those terms describe other aspects of disease dynamics rather than the cause itself.