Typhoid Fever and Paratyphoid Fever

Typhoid fever and paratyphoid fever are life-threatening illnesses caused by Salmonella serotype Typhi and Salmonella serotype Paratyphi, respectively.

Most people in the United States with typhoid fever or paratyphoid fever become infected while traveling abroad, most often to countries where these diseases are common. If you plan to travel outside of the United States, find out if you need the typhoid fever vaccine at www.cdc.gov/travel.