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Tests and diagnosis
By Mayo Clinic staff
Medical and travel history
Your doctor is likely to suspect typhoid fever based on your symptoms and your medical and travel history. But the diagnosis is usually confirmed by identifying S. typhi in a culture of your blood or other body fluid or tissue.
Body fluid or tissue culture
For the culture, a small sample of your blood, stool, urine or bone marrow is placed on a special medium that encourages the growth of bacteria. In 48 to 72 hours, the culture is checked under a microscope for the presence of typhoid bacteria. A bone marrow culture often is the most sensitive test for S. typhi.
Although performing a culture test is the mainstay for diagnosis, in some instances other testing may be used to confirm a suspected typhoid infection, such as a test to detect antibodies to typhoid bacteria in your blood or a test that checks for typhoid DNA in a blood sample.
- Hohmann EL. Epidemiology, microbiology, clinical manifestations, and diagnosis of typhoid fever. http://www.uptodate.com/home/index.html. Accessed March 8, 2010.
- Hohmann EL. Pathogenesis of typhoid fever. http://www.uptodate.com/home/index.html. Accessed March 8, 2010.
- Mintz E. The pre-travel consultation: Travel-related vaccine-preventable diseases: Typhoid and paratyphoid fever. In: Brunette GW, et al. CDC Health Information for International Travel 2010. Atlanta, Ga.: U.S. Department of Health and Human Services, Public Health Service; 2009. http://wwwnc.cdc.gov/travel/yellowbook/2010/chapter-2/typhoid-paratyphoid-fever.aspx. Accessed March 9, 2010.
- Typhoid fever. Centers for Disease Control and Prevention. http://www.cdc.gov/ncidod/dbmd/diseaseinfo/typhoidfever_g.htm. Accessed March 9, 2010.
- Levine MM. Typhoid fever. In: Brachman PS, et al. Bacterial infections of humans: Epidemiology and control. 4th ed. New York, N.Y.: Springer; 2009:913.
- Bhutta ZA. Current concepts in the diagnosis and treatment of typhoid fever. British Medical Journal. 2006;333:78.
- Kaye KS, et al. Salmonella infections (including typhoid fever). In: Goldman L, et al. Cecil Medicine. 23rd ed. Philadelphia, Pa.: Saunders Elsevier; 2008. http://www.mdconsult.com/das/book/body/187350346-3/0/1492/1157.html?tocnode=54626101&fromURL=1157.html#4-u1.0-B978-1-4160-2805-5..50334-7_14301. Accessed March 9, 2010.
- Hohmann EL. Treatment and prevention of typhoid fever. http://www.uptodate.com/home/index.html. Accessed March 8, 2010.
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