Pathogen Pathogens are tiny organisms that can make you sick if they get inside your body. Viruses, bacteria, fungi, parasites and prions are pathogens. They’re commonly called germs. …

Pathogenicity is the potential disease-causing capacity of pathogens, involving a combination of infectivity (pathogen's ability to infect hosts) and virulence (severity of host disease). Koch's …

Oct 21, 2025 · Pathogens—bacteria, viruses, fungi, and parasites—are microorganisms that invade a host and cause illness. Learn more and how to protect yourself.

Apr 26, 2025 · A pathogen is a living thing that causes disease. Viruses and bacteria can be pathogens, but there are also other types of pathogens. Every single living thing, even bacteria …

Apr 3, 2019 · A pathogen is any organism that causes disease. Viruses, bacteria, fungi, and parasites are all examples of pathogens. Your body is naturally full of microbes. However, …

Each individual pathogen causes disease in a different way, which makes it challenging to understand the basic biology of infection. But, when considering the interactions of infectious …

Pathogens are infectious micro-organisms, germs, or biological agents that cause infectious diseases or illnesses in the host human. The ability of a pathogen to cause disease is called …

Apr 26, 2023 · A pathogen is an organism that invades and replicates in the body using tactics to avoid the host's immune system while also coevolving with it.

Aug 21, 2020 · Pathogens are organisms that can cause disease. Learn more about the different types of pathogens, including how they function and the diseases that they produce.

PATHOGEN definition: any disease-producing agent, especially a virus, bacterium, or other microorganism. See examples of pathogen used in a sentence.