What is the definition of a pathogen?

A pathogen is defined as a microbe that can cause infection. These microorganisms can include bacteria, viruses, fungi, and parasites, and they have the ability to invade the body, multiply, and lead to illness. Understanding what constitutes a pathogen is crucial for effective infection control and prevention measures within healthcare settings, as it helps nursing assistants and other healthcare professionals identify and respond appropriately to potential infectious threats to patient safety.

In contrast, the other options describe different aspects of healthcare and disease management but do not define a pathogen. Antibiotics are medications used to treat infections caused by bacteria, while the mention of hygiene pertains to the prevention of disease rather than the pathogens themselves. Lastly, a standard medical procedure refers to established methods of treatment or care in medical practice, which again does not directly relate to the definition of a pathogen.