Typhoid fever - Complications of typhoid fever
NHS Choices Medical Reference
Complications caused by typhoid fever usually only occur in people who have not been treated with appropriate antibiotics or have had delayed treatment.
In such cases, about 1 in 10 people experience complications, which usually develop during the third week of infection.
The two most common complications in untreated typhoid fever are:
- internal bleeding in the digestive system
- splitting (perforation) of a section of the digestive system or bowel, which spreads the infection to nearby tissue
These are described in more detail below.
Most internal bleeding that occurs in typhoid fever is not life threatening, but can make you feel very unwell.
- feeling tired all the time
- pale skin
- irregular heartbeat
- vomiting blood
- passing stools that are very dark or tar-like
A blood transfusion may be required to replace lost blood, and surgery can be used to repair the site of the bleeding.
Perforation is potentially a very serious complication. This is because bacteria that live in your digestive system can move into your stomach and infect the lining of your abdomen (the peritoneum). This is known as peritonitis.
Peritonitis is a medical emergency because tissue of the peritoneum is usually sterile and germ-free. Unlike other parts of the body, such as the skin, the peritoneum does not have an inbuilt defence mechanism for fighting infection.
In cases of peritonitis, an infection can rapidly spread into the blood (sepsis) before spreading to other organs. This carries the risk of multiple organ failure and, if not aggressively treated, it may result in death. The most common symptom of peritonitis is sudden abdominal pain that gets progressively worse.
Peritonitis requires admission to hospital where you will be treated with injections of antibiotics. Surgery will then be used to seal the hole in your intestinal wall.
Read more about treating peritonitis.