What is virulence with example?

What is virulence with example?

Factors that are produced by a microorganism and evoke disease are called virulence factors. Examples are toxins, surface coats that inhibit phagocytosis, and surface receptors that bind to host cells.

What is virulence in biology?

Virulence is defined by the ability of a microorganism to cause disease in the host. Food can carry microorganisms that are virulent and are able to cause disease in the individuals who consume the food.

What is virulence of bacteria?

Virulence is described as an ability of an organism to infect the host and cause a disease. Virulence factors are the molecules that assist the bacterium colonize the host at the cellular level. These factors are either secretory, membrane associated or cytosolic in nature.

What is virulence in plant pathology?

The term virulence has a conflicting history among plant pathologists. Here we define virulence as the degree of damage caused to a host by parasite infection, assumed to be negatively correlated with host fitness, and pathogenicity the qualitative capacity of a parasite to infect and cause disease on a host.

What is virulent and Nonvirulent?

F protein of virulent strains is cleaved into the subunits Fi and F2 (Figure 1) by ubiquitous host proteases found in most tissues, whereas the F protein of non-virulent strains is cleaved only in cells containing trypsin-like enzymes. This enables virulent strains to spread faster within the host.

What is highly virulent?

1a : marked by a rapid, severe, and destructive course a virulent infection. b : able to overcome bodily defensive mechanisms : markedly pathogenic virulent bacteria. 2 : extremely poisonous or venomous. 3 : full of malice : malignant virulent racists. 4 : objectionably harsh or strong virulent criticism.

What is a virulent infection?

Virulence is defined as the degree of pathogenicity of a pathogen (bacteria, fungi, or viruses) and is determined by its ability to invade and multiply within the host.

What is virulence in epidemiology?

Virulence refers to the severity of infection, which can be expressed by describing the morbidity (incidence of disease) and mortality (death rate) of the infection. An example of a highly virulent organism is Yersinia pestis,the agent of plague, which almost always causes severe disease in the susceptible host.

What is a virulent strain?

A virulent disease is one that's infectious, spreading, and making lots of people sick, while a virulent rant is just a verbal attack, causing sickness of the emotional kind. Either way, something virulent puts a strain on the people who get it.