Which term is defined as "an organism that causes disease"?

Which term is defined as "an organism that causes disease"?

• A. Pericardium
• B. Polydipsia
• C. Pathogen
• D. Postmortem

Answer: (C)

An organism that causes disease is called a pathogen. Pathogens include bacteria, viruses, fungi, and parasites that can invade the body and disrupt normal function, leading to illness. In clinical settings, identifying the pathogen helps determine the right treatment to target the infectious agent. The other terms refer to things that are not disease-causing organisms: the pericardium is the heart’s protective sac, polydipsia is excessive thirst, and postmortem means after death or an autopsy. Remember, not all organisms cause disease; pathogens are the subset that do.

An organism that causes disease is called a pathogen. Pathogens include bacteria, viruses, fungi, and parasites that can invade the body and disrupt normal function, leading to illness. In clinical settings, identifying the pathogen helps determine the right treatment to target the infectious agent. The other terms refer to things that are not disease-causing organisms: the pericardium is the heart’s protective sac, polydipsia is excessive thirst, and postmortem means after death or an autopsy. Remember, not all organisms cause disease; pathogens are the subset that do.