Typhoid fever is caused by Salmonella typhi bacteria. Typhoid fever is rare in developed countries. It is still a serious health threat in the developing world, especially for children.
Contaminated food and water or close contact with an infected person cause typhoid fever. Signs and symptoms usually include:
- High fever
- Headache
- Stomach pain
- Constipation or diarrhea
Most people who have typhoid fever feel better a few days after they start antibiotic treatment, but a small number of them may die of complications. Vaccines against typhoid fever are only partially effective. Vaccines usually are reserved for those who may be exposed to the disease or who are traveling to areas where typhoid fever is common.
