Typhoid fever is a bacterial infection that can spread throughout the body, affecting many organs. Without prompt treatment, it can cause serious complications and can be fatal.
It’s caused by a bacterium called Salmonella typhi, which is related to the bacteria that cause salmonella food poisoning.
Typhoid fever is highly contagious. An infected person can pass the bacteria out of their body in their poo or, less commonly, in their pee.
If someone else eats food or drinks water that’s been contaminated with a small amount of infected poo or pee, they can become infected with the bacteria and develop typhoid fever.
Read more about the causes of typhoid fever.
Who’s affected?
Typhoid fever is most common in parts of the world that have poor sanitation and limited access to clean water.
Worldwide, children are thought to be most at risk of developing typhoid fever. This may be because their immune system (the body’s natural defence against infection and illness) is still developing.
But children with typhoid fever tend to have milder symptoms than adults.
Most of these people became infected while visiting relatives in Bangladesh, India or Pakistan. But you’re also at risk if you visit Asia, Africa or South America.
Symptoms of typhoid fever
The main symptoms of typhoid fever are:
- a persistent high temperature that gradually increases each day
- headache
- general aches and pains
- extreme tiredness (fatigue)
- cough
- constipation
As the infection progresses, you may lose your appetite, feel sick, and have a tummy ache and diarrhoea. Some people may develop a rash.
If typhoid fever isn’t treated, the symptoms will continue to get worse over the following weeks and the risk of developing potentially fatal complications will increase.
Read more about the symptoms of typhoid fever and the complications of typhoid fever.
How typhoid fever is treated
Typhoid fever requires prompt treatment with antibiotics.
If typhoid fever is diagnosed early, the infection is likely to be mild and can usually be treated at home with a 7- to 14-day course of antibiotic tablets.
More severe typhoid fever usually requires admission to hospital so antibiotic injections can be given.
With prompt antibiotic treatment, most people will start to feel better within a few days and serious complications are very rare.
If typhoid fever isn’t treated, it’s estimated that up to 1 in 5 people with the condition will die.
Some of those who survive will have complications caused by the infection.