Introduction: Shigella enterotoxin(STxB) is one of the major virulent factors in Shigella dysenteriae type 1 and E. coli O157:H7. which its immunogenicity. adjuvant and delivery characteristic have been proven. https://www.roneverhart.com/Doorking-2334-080-VoIP-RS-232-Control-Box-for-1830-Series/