Following challenge with a selected, high virulence M. tuberculosis Beijing strain, protection was notably greater for both groups of LAV vaccinated animals as compared to BCG at both 30 and 60 days post-challenge.
We found that, for loading perpendicular to the implant interface, the porous surface structure provided a large region that experienced low distortional and volumetric strains, whereas the plasma-sprayed implant provided little local strain protection to the healing tissue.
Strain protection of the periprosthetic bone occurs when the load is transferred through the implant, and hence bypasses the bone (Prendergast 2001, McPherson 2004).
The combination of two or more divergent AMA1 alleles within a single vaccine formulation may provide broader protection against parasites with varying AMA1 sequences in the field, if some degree of cross-strain protection is induced [14], [15].
Mouse immunization with DNA encoding NP elicited CTL, IFN-γ and IL-2 responses, with cross-strain protection against virus challenge, and evidence from adoptive transfer, indicated that both types of T cells act as effectors in protective immunity [54] [55].
Inovios' SynCon vaccines are designed to provide universal cross-strain protection against known as well as newly emergent unmatched strains of pathogens such as influenza.
However, these pre-pandemic vaccines may not be closely matched to an emergent influenza strain or may offer only limited cross-strain protection within the virus subtype, thus an efficacy of 30% is assumed.
Future studies will include genome-wide characterization of breakthrough infections in PfSPZ Vaccine 11, 18, 19 trials using DNA microarrays and genome sequencing to assess cross-strain protection and identify loci under vaccine-induced immune selection.
The attainment of cross-strain protection in vivo by an antigen selected on the basis of its ability to induce cross-strain GIA in vitro strongly hints that the relationship between GIA and protection is causal, encouraging the continued use of the assay for candidate vaccine selection.
S. Paratyphi A, however, is a clonal monomorphic pathogen containing limited genomic variation, 32 33 making it likely that the pathogenicity and immune response to the NVGH308 S. Paratyphi A challenge will translate to wild-type strains and that future vaccines will provide cross-strain protection.
During seasons with a mismatch of B-strains, protection is reduced in adults and even more so in children [ 12- 15] because cross-reactivity between the two B-strain lineages is limited [ 2, 16, 17].
