Hi supriya ,Typhoid fever is an infectious disease caused by the bacteria Salmonella typhi. It is also known as enteric fever, or commonly just typhoid. Typhoid fever and paratyphoid fever are clinically indistinguishable diseases, collectively called enteric fever. It easily spreads through contaminated food and water supplies and close contact with others who are infected. The illness is characterized by very high fever, sweating, gastroenteritis, and diarrhea. Although typhoid is very rare in the developed world, it is still a serious health threat in the developing world. Typhoid is treatable with antibiotics and maintaining proper hygiene.