Sentence examples for virulence change from inspiring English sources

This asymmetric response to virulence change is due to the fact that the predator species has to juggle between predation, resource competition and pathogenic infection.

There was no significant interaction between treatment and parasite genotype on either measures of virulence (change in RBC density: = 2.90, P = 0.58; change in mouse weight: = 3.66, P = 0.45).

Even "per pathogen pathogenicity" (introduced as "per parasite pathogenicity" in [ 35]) is not a reliable marker, because the sensitivity (tolerance) of an immune compromised host to the same level of symbiont /pathogen load may also change independent of a virulence change in the symbiont/pathogen.

Furthermore, these techniques do not detect novel or unexpected viral agents nor antigenic or virulence changes in known viruses.

The main objective of this study was to determine molecular characteristics of recently isolated Polish strains of MDV and to identify factors responsible for changes of MDV virulence; changes that are commonly associated with mutation of the nucleotide sequence of meq oncogene [ 10].

The most abundant polysaccharide in the A. fumigatus cell wall is α(1,3 glucan and among the three α(1,3 glucan synthases identified in the fungus genome, only Δ ags3 mutant has shown virulence changes (hypervirulence) in an experimental mouse model of aspergillosis [ 27].

The Red Queen Hypothesis explains how resistance and virulence temporally change in parasitic relationships.

Recent evidence suggests that during the geographic spread of the fungus its virulence has changed.

We speculate that a virus mutation causes an increase in virulence or changes effects on infected C6/36 cells.

Indeed, most strategies associated with wildlife disease management, particularly of zoonotic pathogens, result in short-term results that are effective at an 'ecological' time scale; yet, these same strategies can have profound consequences for host-pathogen coevolution, including enhanced or reduced virulence, and changes in transmission dynamics (Gandon and Day 2007).

The genetic mechanism of BPH biotype generation in BPH is still not well understood, but there is overwhelming evidence from many plant disease/pest combinations that virulence involves the change or loss of specific effector proteins that are recognized by the plant host to induce the resistance (antibiosis) response.