Any microorganism which causes disease; a pathogenic organism; an infectious microorganism; a bacterium, virus, or other agent which can cause disease by infection; -- opposed to zymogene. The spelling pathogene is now archaic.
Pathogens or germs are microorganisms that produce diseases. Common pathogens regulated in drinking water include bacteria (such as Salmonella) and protozoan parasites (such as Giardia and Cryptosporidium). Other pathogens (such as enteric [intestinal] viruses) are controlled in drinking water and associated with turbidity. Note that water sources are commonly tested for the possible presence of pathogens by measuring total coliform bacteria.
Any microorganism that can cause disease. Salmonella is always considered a pathogenic microorganism. E. coli is considered an opportunistic pathogen. It is not always pathogenic, but given the opportunity, it can cause food-borne illness.
Any organism that can cause disease. Many bacteria are pathogens but some are not e.g. Staphylococcus aureus is a pathogen and causes wound infections;Lactobacillus acidophilus is not a pathogen, indeed it is of benefit in maintaining the health acidity of the vagina.
Disease-producing microbes, including viruses, fungi, and bacteria, that can trigger the production of fever. In evolutionary terms, defense against pathogens may be the driving force behind sexual reproduction.
a virus, microorganism (including bacteria, plasmids, or other genetic elements), proteinaceous infectious particle (prion) or recombinant microorganism (hybrid or mutant) that is known or reasonably expected to cause disease in humans or animals
a virus or micro-organism (including its viruses, plasmids, or other genetic elements, if any) or a proteinaceous infectious particle (prion) that has the potential to cause disease in humans or animals
Microorganisms that can cause disease in other organisms or in humans, animals, and plants. Pathogens may be bacteria, viruses, or parasites transported in sewage and runoff from agricultural and other areas.
Microorganisms that can cause disease in other organisms or in humans, animals and plants (e.g., bacteria, viruses, or parasites) found in sewage, in runoff from farms or rural areas populated with domestic and wild animals, and in water used for swimming. Fish and shellfish contaminated by pathogens, or the contaminated water itself, can cause serious illness.
Like viruses and diseases, pathogens represent a danger to insects in many stages. Pathogens are sicknesses which attack, slowly weakening its ability to maintain its health. Larvae are particularly prone to attacks of pathogens.
A pathogen or infectious agent is a biological agent that causes disease or illness to its host. The term is most often used for agents that disrupt the normal physiology of a multicellular animal or plant. However, pathogens can infect unicellular organisms from all of the biological kingdoms.