Although the superantigen poses the greatest threat to host health , all virulence factors contribute to Y. pseudotuberculosis viability in vivo .
Although the superantigen poses the greatest threat to host health , all virulence factors define the bacterium 's pathogenic characteristics .
Although the superantigen poses the greatest threat to host health , all virulence factors contribute to Y. pseudotuberculosis viability in vivo and define the bacterium 's pathogenic characteristics .