1. Heymann DL. In: Heymann DL, editor. Control of Communicable Diseases. An Official Report of the American Public Health Association. 20th ed. United States of America: Alpha Press; 2014.
2. World Health Organization. The diagnosis, treatment and Prevention of Typhoid Fever. World Health Organisation, Department of Vaccines and Biologicals: CH-1211 Geneva 27; 2003. WHO/V&B/03.07.
3. Crump JA, Luby SP, Mintz ED. The global burden of typhoid fever. Bull World Health Organ. 2004;82:346–53.
4. Centers for Disease Control. Typhoid Fever 2013. Available from: https://www.cdc.gov/typhoid-fever/index.html . Accessed 27 July 2015.
5. Mogasale V, Maskery B, Ochiai RL, Lee JS, Mogasale VV, et al. Burden of typhoid fever in low-income and middle-income countries: a systematic, literature-based update with risk-factor adjustment. Lancet Glob Health. 2014;2:e570–80.