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Typhoid fever, also known simply as typhoid, is a disease caused by Salmonella enterica serotype Typhi bacteria, also called Salmonella Typhi. [2] [3] Symptoms vary from mild to severe, and usually begin six to 30 days after exposure. [4] [5] Often there is a gradual onset of a high fever over several days. [4]
The name comes from the Greek tûphos (τῦφος), meaning 'hazy' or 'smoky' and commonly used as a word for delusion, describing the state of mind of those infected. [7] While typhoid means 'typhus-like', typhus and typhoid fever are distinct diseases caused by different types of bacteria, the latter by specific strains of Salmonella typhi. [8]
In 2000, typhoid fever caused an estimated 21.7 million illnesses and 217,000 deaths. [1] It occurs most often in children and young adults between 5 and 19 years old. [2] In 2013, it resulted in about 161,000 deaths – down from 181,000 in 1990. [3]
Diagnosis of continuous fever is usually based on the clinical signs and symptoms but some biological tests, chest X-ray and CT scan are also used. [2] Typhoid fever is an example of continuous fever and it shows a characteristic step-ladder pattern, a step-wise increase in temperature with a high plateau.
Typhus fever was also a significant killer during the American Civil War, although typhoid fever was the more prevalent cause of US Civil War "camp fever." Typhoid is a completely different disease from typhus. Typically more men died on both sides of disease than wounds. [citation needed]
Typhoid fever causes 11 million infections and more than 100,000 deaths per year, and is most prevalent in south Asia – which accounts for 70% of the global disease burden.
Francisco Hernández de Toledo, a Spanish physician, insisted on using the Nahuatl word when describing the disease to correspondents in the Old World. [19] In 1970, a historian named Germaine Somolinos d'Ardois looked systematically at the proposed explanations, including hemorrhagic influenza, leptospirosis , malaria , typhus, typhoid , and ...
Undulant fever, seen in brucellosis. Typhoid fever is a continuous fever showing a characteristic step-ladder pattern, a step-wise increase in temperature with a high plateau. [47] Among the types of intermittent fever are ones specific to cases of malaria caused by different pathogens. These are: [48] [49]