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In biology, a pathogen (Greek: ÏÎ¬Î¸Î¿Ï pathos âsuffering, passionâ and -Î³ÎµÎ½Î®Ï -genÄs âproducer ofâ) in the oldest and broadest sense is anything that can produce disease, a term which came into use in the 1880s.he host may be an animal, a plant, a fungus, or even another microorganism. There are several substrates including pathways where the pathogens can invade a host. The principal pathways have different episodic time frames, but soil contamination has the longest or most persistent potential for harboring a pathogen.
Pathogens are easily called as infectious agents. We contact pathogens in our daily life. These are microorganisms that cause diseases in host plants and animals; e.g. virus, bacteria, and fungi. Not all microbes are harmful; pathogens refer specifically to the ones that can cause disease in the host.t causes our immune system to produce the antibody against it. Antibody is used by the immune system to identify and neutralize the foreign particles like bacteria and viruses. Basically, antigens are categorized as self-antigen and non-self-antigen.