Sentence examples for increase in virulence from inspiring English sources

Despite the success of these vaccines in reducing losses from the disease, Marek's disease virus (MDV) strains have shown a continuing increase in virulence, presumably due to the inability of the current vaccines in preventing MDV replication.

We then injected these bacteria into insects and observed an increase in virulence.

Whether this truly reflects a slight increase in virulence remains to be determined.

The most unexpected result of this study is that our selection procedure has also induced an increase in virulence.

Likewise, the virulence elasticity of the infectiousness duration is the percentage increase in infectiousness duration per percentage increase in virulence.

To determine if this increase in virulence might be due to increased bacterial load, three additional mice for each experimental group were infected as described above.

Thus, we can conclude that this single amino acid mutation is solely responsible for the increase in virulence of the QA23ML-3Egg vinus in mice.

To demonstrate the role of enterocci in the increase in virulence, the Enterococcus spp. strain was replaced by the S. mitis strain (which harboured ply gene).

Any increase in virulence or host adaptation would require a reassessment of the risk analyses relating to the possibility of a significant secondary outbreak of vCJD.

We therefore measured FlhDC dependent phenotypes in order to better understand what has determined the increase in virulence during our selection experiment.

Aeroprotection of bystander organisms may also explain the synergistic increase in virulence of F. nucleatum when combined with Porphyromonas gingivalis, as compared to either species alone [84], [85].