has role virmugen Shigella gene virmugen role senA from Shigella NCBI_Gene_ID: 3671021; PMID: 19932216 Rebecca Racz gene 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 Oliver He VO:0002679