Sentence examples for virulence changes from inspiring English sources

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

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 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].

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.

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).

This finding suggests that AP bacteria are somehow "pre-adapted" to invasiveness and, consequently, when injected into mice, they do not undergo much virulence-related changes as they already possess a thicker capsule, lack a functional SpeB, are equipped with surface virulence proteins, and secrete ready-to-use toxins, including the potent DNase, Sda1.

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

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