Microorganism capable of producing an infection and disease in a healthy human.
the actual cause of an illness, an example being a virus.
an organism (virus, rickettsia, bacteria, fungus, protozoan, or helminth) that is capable of producing infection or infectious disease.
A biological organism that can establish a process of infection.
The agent by which an infection is capable of being transmitted by direct or intimate contact (e.g., sex). These agents include viable microorganisms including bacterium, virus, rickettsia, parasite, fungus, or recombinant, hybrid or mutant that is known or reasonably believed to cause disease in humans or animals.
an agent capable of producing infection
a type of microorganism, helminth, or virus that causes or significantly contributes to the cause of increased morbidity or mortality of human beings
An organism (bacteria, fungus, virus, parasite) that can be transmitted with or without contact to produce symptoms of disease.
Any organism, such as a virus or bacterium, that is pathogenic and capable of being communicated by invasion and multiplication in body tissues.
The chemical organism that causes a particular disorder. Scientific opinion is divided about the biological nature of the agent that causes SEs. The two main theories are the Prion hypothesis and the Virus theory.
A living organism that enters and multiplies in a host (that is, produces an infection); the infection can be without symptoms, or it can produce disease.
Any organism, such as a pathogenic virus, parasite, or or bacterium, that is capable of invading body tissues, multiplying, and causing disease.
Living or quasi-living organism or particle that causes an infectious disease. Bacteria, viruses, fungi, protozoa, helminths, and prions are infectious agents.
