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Typhoid Fever and Paratyphoid Fever


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										What are typhoid fever and paratyphoid fever?
Typhoid fever is a life-threatening illness caused by *Salmonella* Typhi bacteria. Paratyphoid fever is a life-threatening illness caused by *Salmonella* Paratyphi bacteria.
How many people get typhoid fever and paratyphoid fever each year?
Worldwide, typhoid fever affects an estimated 11 to 21 million people and paratyphoid fever affects an estimated 5 million people each year.
In the United States each year, about 350 people are diagnosed with typhoid fever and 90 people are diagnosed with paratyphoid fever each year. These cases do not include people who do not seek medical care, who are not tested for either disease, or whose disease is not reported to CDC. CDC estimates typhoid fever affects 5,700 people in the United States each year. CDC has not made estimates for *Salmonella* Paratyphi.
Most people diagnosed in the United States have traveled to places where the diseases are most common.
Where are the diseases most common?
Typhoid fever and paratyphoid fever are most common in parts of the worldwhere water and food may be unsafe and sanitation is poor. Travelers to South Asia, especially Pakistan, India, and Bangladesh, should take precautions to prevent infection. Typhoid fever and paratyphoid fever are somewhat less common in East Asia, Africa, the Caribbean, and Central and South America. Both diseases are rare in the United States, Canada, Western Europe, Australia, or Japan.
How are typhoid fever and paratyphoid fever spread?
These diseases are spread through sewage contamination of food or water and through person-to-person contact. People who are currently ill and people who have recovered but are still passing the bacteria in their poop (stools) can spread *Salmonella* Typhi or *Salmonella* Paratyphi.
You can get typhoid fever or paratyphoid fever if
You eat food or drink a beverage that has been touched by a person who is shedding (getting rid of) *Salmonella* Typhi or *Salmonella* Paratyphi in their poop and who has not washed their hands thoroughly after going to the bathroom.
Sewage contaminated with *Salmonella* Typhi or *Salmonella* Paratyphi gets into water you drink.
Sewage contaminated with *Salmonella* Typhi or *Salmonella* Paratyphi gets into water used to rinse food you eat raw.What happens if you eat or drink something contaminated with *Salmonella* Typhi or *Salmonella* Paratyphi?
If you consume a food or drink contaminated with *Salmonella* Typhi or *Salmonella* Paratyphi, the bacteria can multiply and spread into the bloodstream, causing typhoid fever or paratyphoid fever.
How can I protect myself from typhoid fever and paratyphoid fever?
If you are planning to travel outside the United States, you should do the following:
Get vaccinated against typhoid fever (there is no vaccine against paratyphoid fever).
Find out how to avoid getting sick from food and drinks.Can animals spread typhoid fever or paratyphoid fever to people?
No. *Salmonella* Typhi and *Salmonella* Paratyphi live only in humans.
Animals can spread other kinds of *Salmonella* to humans, so it’s important to wash your hands after contact with animals, their poop, or places where animals live, feed, or roam. Get more tips >
Next: See the symptoms of typhoid fever and paratyphoid fever >Information for TravelersFind out who should get the typhoid fever vaccine and when >
Read the typhoid fever and paratyphoid fever chapter in *CDC Health Information for International Travel* >
Get information and prevention tips on CDC’s Traveler’s Health site >
Learn about symptoms, prevention, and treatment by reading CDC’s Typhoid and Paratyphoid Fever Factsheet > pdf icon[PDF – 159 KB]
Reduce your chances of getting sick while traveling with these safe eating and drinking tips >
							
					
						Page last reviewed:  November 16, 2020					Content source: 	Centers for Disease Control and Prevention
, National Center for Emerging and Zoonotic Infectious Diseases (NCEZID)
, Division of Foodborne, Waterborne, and Environmental Diseases (DFWED) homeTyphoid Fever and Paratyphoid Fever
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