avirulent

In most cases, this stage is not an agricultural threat because the bacteria usually become avirulent after recovering.

Many species in this genus can be characterized as opportunistic avirulent plant symbionts.

These strains are of course avirulent.

Such transfer creates virulent strains from previously avirulent Agrobacteria.

The avirulent strain, CMM100, does not contain these plasmids.

First clinical results with tumor-cell vaccines modified with live but avirulent Newcastle disease virus.

Deletion of vapA renders the resulting strain avirulent.

The R form, however, lacking a capsule-its outer surface being cell wall-was considered avirulent, not prompting pneumonia.

The vaccine is a genetically modified avirulent vaccine that has demonstrated protection against O78 and untypeable strains.

One such example was elucidated by infection with virulent and recombinant, avirulent strains of T. gondii.

The research continued throughout World War I until 1919, when the now avirulent bacilli were unable to cause tuberculosis disease in research animals.

By contrast, PR-5 induction by avirulent bacteria involves at least two additional pathways that also act in an additive fashion.

"The rest of the genes were derived from an avirulent egg-adapted influenza A/PR/8/34 strain.

The mean death time in embryonated chicken eggs was found to be more than 144h, indicating APMV-7 to be avirulent for chickens.

The virulent and avirulent strains produced the same amount of ectopolysaccharides, suggesting that EPS does not play a significant role in pathogenicity.

Based on prior studies from our laboratory [ 9 10 ] , we predicted that this isolate would be avirulent in the mouse skin air sac model.

Passive immunity may protect against challenge with homologous IBDV, as does previous infection with homologous avirulent strains.

I've brought in plague antigens from Tampa, and I'm having serums made up from avirulent strains flown in right now from Los Angeles.'

The Ti plasmid is lost when Agrobacterium is grown above 28 C. Such cured bacteria do not induce crown galls, i.e. they become avirulent.

The Pst DC3000 expressing avrRpm1 gene induces hypersensitive cell death in Col-0 plants and was used to infect plants for constructing the avirulent bacterial library.

In these studies, neither SA/SA analogs nor avirulent bacteria were able to induce SAR on npr1 mutant plants.

Conclusions In conclusion, the additive effects of two pathways explain most if not all induction of SAR and PR-1 gene expression by the avirulent bacteria examined.

This correlation of the presence of the catalase-peroxidase in many virulent but not in avirulent strains suggests a direct role in the virulence of enterohemorrhagic E. coli .

AVA is produced from culture filtrates of an avirulent, nonencapsulated mutant of the B. anthracis Vollum strain known as V770-NP1-R.

Comparison between virulent and avirulent organisms identify candidate genes that code for epitopes that solicit T-cell responses by looking for sequences that are unique to virulent strains.