has role virmugen Shigella gene virmugen role msbB2 from Shigella A virG, senA, senB, and msbB2 mutant (WRSs3) is attenuated in guinea pigs and induced significant protection from challenge with wild type S. sonnei. Attenuation and protection from WRSs3 is comparable to live attenuated vaccine strain WRSS1 NCBI_Gene_ID: 3670926; PMID: 19932216] Oliver He gene Rebecca Racz