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, pathogene
any agent that can cause disease
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005


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

McGraw-Hill Concise Encyclopedia of Bioscience. © 2002 by The McGraw-Hill Companies, Inc.


A disease-producing agent; usually refers to living organisms.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The researchers found that 61.7 percent of the 958 participants were positive for one or more pathogens (29.4 percent rhinovirus), and that 16.9 percent of participants experienced treatment failure.
Such measures can include rotation of strawberries with non-susceptible crops, which provides an interval during which pathogen populations can decline by attrition.
Many experts see sequencing as the future for clinical laboratory diagnostics, but while this breakthrough technology holds exciting potential, there are some important cautions to consider before adopting NGS for pathogen diagnosis.
vineale genotype, mycorrhizae and pathogen as the three factors (3 plant genotypes x 2 mycorrhiza treatments x 3 pathogen treatments, 14 replicates, [] = 252).
In addition, the accompanying SYNCT Software provides a comprehensive approach to data analysis and reporting, and enables the NxTAG Respiratory Pathogen Panel to integrate easily into any laboratory.
Additional initiatives that address pathogen reduction have been investigated by researchers at Oklahoma State University.
Zephyr detects foodborne pathogens such as salmonella, e.coli, listeria and campylobacter in dry foods, meats and on food preparation surfaces; significant issues for food producers worldwide.
Similar methyltransferase proteins are found in other highly infectious bacteria, including the pathogen Mycobacterium tuberculosis that causes Tuberculosis, a disease that results in more than 1 million deaths annually.
* Amends the Federal Food, Drug, and Cosmetic Act to prohibit the sale of any FDA-regulated food that has not undergone Secretary designated pathogen reduction treatment or been certified to only contain ingredients that are virtually pathogen flee.
The Water Environment Research Foundation (WERF) is now accepting proposals for research that will lead to better risk assessment of pathogens in recreational waters.
"From a health standpoint, the current gold standard is to determine if a pathogen can be grown in the lab" explains researcher Ana Rule of Johns Hopkins University, Baltimore.
Diseases of humans and their domestic mammals: pathogen characteristics, host range and the risk of emergence.