1. Gorbach Sl, Sleisenger MH, Fordtran JS. Infectious diarrhea and bacterial food poisoning. In: Gastrointestinal disease, 5th ed. Philadelphia: W.B. Saunders; 1993 .
2. Le TP and Hoffman SL, Guerrant RL, Walker DH. Tropical Infectious Diseases. In: Principles,Pathogens and Practice, 2nd ed. Churchill Livingstone; 2006 .
3. Osler W. The Principles and Practice of Medicine, Designedfor the Use of Practitioners and Students of Medicine. NewYork, NY: D. Appleton. 1905.
4. Rogerson SJ, Spooner VJ, Smith TA, Richens J, Hydrocortisonein chloramphenicol-treated severe typhoid fever inPapua New Guinea. Trans R Soc Trop Med Hyg 85: 113–116.. 1991.
5. Haque A. Neurological manifestations of Enteric fever. In: Chopra 1S, Sawhney IMS, editors Neurology in tropics I" ed New Delhi : BI Churchill Livingstone,. 1999; 506 : 12 .