The ability of an agent of infection to produce disease. The virulence of a microorganism is a measure of the severity of the disease it causes.

The ability of a microorganism to cause damage to its host.

The ability that a certain organism has to create disease

the degree of pathogenecity of a microorganism as indicated by the severity of disease produced and the ability to invade the tissues of the host. virulent (adj.)

1660s, from Late Latin virulentia, from Latin virulentus "full of poison" (see virulent). Related: Virulency (1610s).

The degree of ability of an organism to cause disease.

The relative infectiousness of a bacteria or virus, or its ability to overcome the resistance of the host metabolism.

The degree of pathogenicity. © Nature Education

Ability to infect or cause disease.

The degree of pathogenicity of a parasite.

The degree or ability of a disease-causing organism (e.g. a bacterium, virus or parasite) to cause disease.

the relative ability of a pathogenic microorganism to cause disease.

Pathogenic or poisonous potential of bacteria, fungi, or other agents. Virus:

(n) extreme harmfulness (as the capacity of a microorganism to cause disease)(n) extreme hostility

  The severity with which an organism can cause a disease.

Ability to overcome defensive mechanisms; destructiveness

The degree of Pathogenicity within a group or species of microorganisms or Viruses as indicated by case fatality rates and/or the ability of the organism to invade the Tissues of the host. The pathoge [..]

Virulence is a measure of how destructive the parasite is of its host: it can be measured precisely as the reduction in fitness of a parasitized host relative to an unparasitized host. A highly virule [..]

The degree of pathogenicity within a group or species of microorganisms or viruses as indicated by case fatality rates and/or the ability of the organism to invade the tissues of the host. The pathoge [..]

The ability of a microorganism to cause damage to its host.

How well or quickly a virus or bacteria is able to cause disease in a person.

The ability of a pathogen to cause a disease. May also be used to describe the severity of the disease the pathogen causes.

How well or quickly a virus or bacteria is able to cause disease in a person.[3] Virulence-- The relative capacity of a pathogen to overcome body defenses. [7]

The relative capacity of a pathogen to overcome body defenses.

¡@ relative capacity to cause disease; degree or measure of pathogenicity of a parasitic organism or virus (BMS). the observed infective capacity of individual strains of the pathogen on application t [..]

 The relative capacity of a pathogen to overcome body defenses.

how able the bacteria is to cause disease

The degree or ability of a disease-causing organism (e.g. a bacterium, virus or parasite) to cause disease.

The relative capacity of a pathogen to overcome body defenses.

Virulence is the degree to which the bacterium causes disease in a human.

The ability to cause rapid and severe disease.

Ability to cause disease.

The ability of a pathogen to cause disease, for example, the number of deaths, the proportion of people exposed to infection who became ill and how rapidly the infection spreads through the body

The degree of ability of an organism to cause disease.

The proportion of persons with clinical disease, who after becoming infected, become severely ill or die.

Usually, the damage inflicted on a host by a pathogen or parasite; sometimes, the capacity of a pathogen or parasite to infect and develop in a host.

Morbidity and mortality of a host that is caused by parasites and pathogens. More specifically, it is the fitness component of the parasite that is associated with the harm done to the host.

The relative capacity of a pathogen to overcome body defenses.

Ability (of pathogens) to infect organisms and cause disease

the state of being virulent a measure of how virulent a thing is