1. Cummings PL, Sorvillo F, Kuo T (2010). Salmonellosis-related mortality in the United States, 1990-2006. Foodborne Pathog Dis,7 (11): 1393-9. 2. Bhan MK, Bahl R, Bhatnag ar S (2005). Typhoid and paratyphoid fever. Lancet, 366 (9487): 749-62. 3. Crump JA. Progress in Typhoid Fever Epidemiology (2019). Clin Infect Dis, 15, 68 (Suppl 1): S4-S9. 4. Masoumi Asl H, Gouya MM, Nabavi M, Aghili N (2013). Epidemiology of Typhoid Fever in Iran during Last Five Decades from 1962-2011. Iran J Public Health, 42 (1): 33-8.