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 …

What Is a Pathogen? Coughing and sneezing, bug or animal bites, contaminated food or objects and close contact can all transmit pathogens. Pathogens are microorganisms that can make …

Oct 21, 2025 · How many pathogens are there? There are about 1400 human pathogens that have been identified, but there are believed to be many more which have not yet been …

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.

Aug 4, 2025 · A pathogen is any microbe that causes disease in its host. It is not always a black-and-white distinction; some microbes can be harmless in one context and pathogenic in …

pathogen noun path· o· gen ˈpa-thə-jən : a specific causative agent (such as a bacterium or virus) of disease

We normally think of pathogens in hostile terms—as invaders that attack our bodies. But a pathogen or a parasite, like any other organism, is simply trying to live and procreate.

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.

Jul 20, 2025 · Pathogens spread from a source to a host through several distinct routes. Direct contact involves the physical transfer of microorganisms, such as when shaking hands. This is …

There are five main types of pathogens: virus, bacterium, fungus, protozoa, and helminth. The severity of the diseases caused by pathogens is varied. Some infections are mild whereas …