Diphtheria is a highly contagious infection that affects the nose and throat, and sometimes the skin. It's rare in the UK, but there's a small risk of catching it if you travel to some parts of the world.
Diphtheria can be a serious illness and sometimes fatal, especially in children, if it’s not treated quickly. Vaccination can prevent it.
Diphtheria is rare in the UK because babies and children have been routinely vaccinated against it since the 1940s.
Diphtheria is a highly contagious bacterial infection. It's spread by coughs and sneezes, or through close contact with someone who is infected.
You can also get it by sharing items, such as cups, cutlery, clothing or bedding, with an infected person.
Symptoms usually start 2 to 5 days after becoming infected.
Symptoms of diphtheria include:
- a thick grey-white coating that may cover the back of your throat, nose and tongue
- a high temperature (fever)
- sore throat
- swollen glands in your neck
- difficulty breathing and swallowing
In countries with poor hygiene, infection of the skin (cutaneous diphtheria) is more common.
If it's cutaneous diphtheria, it can cause:
- pus-filled blisters on your legs, feet and hands
- large ulcers surrounded by red, sore-looking skin
Get urgent medical help if:
you have symptoms of diphtheria and:
- you're in an area of the world where the infection is widespread
- you have recently returned from somewhere where the infection is widespread
- you have been in close contact with someone who has diphtheria
Diphtheria needs to be treated quickly in hospital to help prevent serious complications, such as breathing difficulties or heart problems.
The main treatments are:
- antibiotics to kill the diphtheria bacteria
- medicines that stop the effects of the harmful substances (toxins) produced by the bacteria
- thoroughly cleaning any infected wounds if you have diphtheria affecting your skin
Treatment usually lasts 2 to 3 weeks. Any skin ulcers usually heal within 2 to 3 months, but may leave a scar.
People who have been in close contact with someone who has diphtheria may also need to take antibiotics, or may be given a dose of the diphtheria vaccination.