has role virmugen Shigella gene virmugen role icsA/virG from Shigella Rebecca Racz VO:0002676 Oliver He gene NCBI_Gene_ID: 1238021; PMID: 7927802 An aroA and virG mutant (CVD 1203) is attenuated in guinea pigs, as shown by the Sereny test. Guinea pigs inoculated with CVD 1203 were also protected from challenge with wild type S. flexneri