pathogen

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Related to Disease agent: communicable disease, Infectious diseases

pathogen

, pathogene
any agent that can cause disease

Pathogen

Any agent capable of causing disease. The term pathogen is usually restricted to living agents, which include viruses, rickettsia, bacteria, fungi, yeasts, protozoa, helminths, and certain insect larval stages. See Disease

Pathogenicity is the ability of an organism to enter a host and cause disease. The degree of pathogenicity, that is, the comparative ability to cause disease, is known as virulence. The terms pathogenic and nonpathogenic refer to the relative virulence of the organism or its ability to cause disease under certain conditions. This ability depends not only upon the properties of the organism but also upon the ability of the host to defend itself (its immunity) and prevent injury. The concept of pathogenicity and virulence has no meaning without reference to a specific host. For example, gonococcus is capable of causing gonorrhea in humans but not in lower animals. See Medical mycology, Medical parasitology, Plant pathology, Plant viruses and viroids, Virulence

pathogen

[′path·ə·jən]
(medicine)
A disease-producing agent; usually refers to living organisms.
References in periodicals archive ?
Consequently, they are not currently considered relevant communicable diseases or disease agents for the purpose of this regulation.
Of these disease agents a vaccine is only available for M.
One disease agent of high priority is classical swine fever virus, a highly infectious virus of pigs that threatens the U.
Vaccines wage their wars under the radar, priming immune systems to fight a disease agent that is quickly quashed if it ever does invade.
To help the nation -- and the world -- understand and prepare for contagious outbreaks, the National Institutes of Health's Models of Infectious Disease Agent Study (MIDAS) adds new research expertise to increase its capacity to simulate disease spread, evaluate different intervention strategies and help inform public health officials and policymakers.
In our opinion, there is a historical difference in the way FDA has reviewed these drugs, and this has significantly affected the length of time it takes for an Alzheimer disease agent to get to market," said Lindsey Spindle, a spokeswoman for Avalere Health LLC, a company that examines health care business strategy and how public policy affects it, which conducted the study.
Topics included studies of the disease agent and related pathogens, methods of testing and the prospects for vaccination, and transmission routes and policies for bringing the spread under control.
Among its mainstay drugs, the Aricept Alzheimer's disease agent saw brisk sales of 141.
In general, leaf spots on plants are associated with fungus and this is the disease agent afflicting your tree.
This effectively "dilutes" the disease agent and makes it less likely for an infected tick to transmit the disease to a human (Ostfeld and Keesing 2000a).
This project will address the concern by strengthening regional capacity in Southeast Asia for understanding, preventing, preparing for, and responding to disease agents that have bioterrorism and/or pandemic potential.
In case the sensors are mass-produced, they can be used in medical and clinical diagnosis systems to measure and detect disease agents and also chemical and biological measurements.