virulence

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virulence

 [vir´u-lens]
the degree of pathogenicity of a microorganism as indicated by case fatality rates and/or its ability to invade the tissues of the host; the competence of any infectious agent to produce pathologic effects. adj., adj vir´ulent.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

vir·u·lence

(vir'yū-lĕns),
The disease-evoking severity of a pathogen; numerically expressed as the ratio of the number of cases of overt infection to the total number infected, as determined by immunoassay.
[L. virulentia, fr. virulentus, poisonous]
Farlex Partner Medical Dictionary © Farlex 2012

virulence

Epidemiology The proportion of persons with clinical disease, who after infection, become severely ill or die. See Neurovirulence.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

vir·u·lence

(vir'yū-lĕns)
The disease-evoking power of a pathogen; numerically expressed as the ratio of the number of cases of overt infection to the total number infected, as determined by immunoassay.
[L. virulentia, fr. virulentus, poisonous]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

virulence

The capacity of any infective organism to cause disease and to injure or kill a susceptible host.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

virulence

the collective properties of an organism that render it pathogenic to another one, the host.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

vir·u·lence

(vir'yū-lĕns)
The disease-evoking power of a pathogen.
[L. virulentia, fr. virulentus, poisonous]
Medical Dictionary for the Dental Professions © Farlex 2012