In biology, a pathogen (Greek: πάθος, pathos "suffering", "passion" and -γενής, -genēs "producer of"), in the oldest and broadest sense, is any organism or agent that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ. [1]

Apr 3, 2019 · A pathogen is any organism that causes disease. Viruses, bacteria, fungi, and parasites are all examples of pathogens.

Aug 21, 2020 · In this article, we look at different pathogens, how they affect people, and the diseases they cause. We also explain how pathogens spread and how to reduce the risk of infection. Bacteria,...

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 pathogenicity. The degree to which an organism is pathogenic is called virulence.

What is a pathogen? A pathogen is defined as an organism causing disease to its host, with the severity of the disease symptoms referred to as virulence. Pathogens are taxonomically widely diverse and comprise viruses and bacteria as well as unicellular and multicellular eukaryotes.

Apr 26, 2023 · A pathogen is a biological entity that possesses the ability to cause disease by invading and replicating within the host organism, utilizing various mechanisms to evade or subvert the host’s immune response. The dynamic relationship between pathogens and their hosts is usually guided by co-evolution with a complex interplay between the ...

May 28, 2023 · 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 themselves, can...

A human pathogen is a pathogen (microbe or microorganism such as a virus, bacterium, prion, or fungus) that causes disease in humans. The human physiological defense against common pathogens (such as Pneumocystis) is mainly the responsibility of the immune system with help by some of the body's normal microbiota.

In order to survive and multiply in a host, a successful pathogen must be able to: (1) colonize the host; (2) find a nutritionally compatible niche in the host body; (3) avoid, subvert, or circumvent the host innate and adaptive immune responses; (4) replicate, using host resources; and (5) exit and spread to a new host.

Jun 12, 2024 · Pathogens are what most people call germs—tiny organisms that cause diseases. There are different types of pathogens found all over the world. Depending on the type of germ and your body, you can get a minor illness or a deadly disease when a pathogen enters.