has role virmugen Shigella gene virmugen role senB from Shigella NCBI_Gene_ID: 3668265; PMID: 19932216 VO:0002681 gene Rebecca Racz Oliver He A virG, senA, and senB mutant (WRSs2) is attenuated in guinea pigs and induced significant protection from challenge with wild type S. sonnei. Attenuation and protection from WRSs2 is comparable to live attenuated vaccine strain WRSS1