Coeliac disease is a lifelong autoimmune condition where the body’s immune system reacts to gluten by attacking the lining of the small intestine. While the primary symptoms are digestive, the condition has systemic effects that can influence how the body responds to infections. For some individuals, the underlying immune dysregulation and potential impact on the spleen can lead to an increased vulnerability to specific types of bacteria and viruses. Understanding these risks is essential for ensuring that patients receive the correct preventative care, including vaccinations and regular health monitoring. In the United Kingdom, healthcare professionals follow specific clinical protocols to protect individuals with coeliac disease from avoidable infections.
What We’ll Discuss in This Article
- The biological link between coeliac disease and the immune system
- Understanding hyposplenism and its role in infection risk
- Specific types of infections associated with the condition
- The importance of the pneumococcal vaccine and other immunisations
- How nutrient malabsorption impacts the ability to fight illness
- Practical steps for maintaining a healthy immune system
Coeliac disease can increase the risk of certain infections due to potential changes in spleen function and nutrient malabsorption
The increased risk of infection in people with coeliac disease is primarily linked to a condition called hyposplenism, where the spleen does not function at its full capacity. The spleen is an important part of the immune system that helps fight off infections by filtering bacteria from the blood. In some individuals with coeliac disease, the spleen becomes less effective at clearing specific encapsulated bacteria, such as those that cause pneumonia and meningitis. Additionally, the chronic inflammation and malabsorption of vitamins like vitamin D and zinc can further weaken the immune response, making it more difficult for the body to recover from common illnesses.
Understanding hyposplenism and the role of the spleen
Hyposplenism occurs in a proportion of adults with coeliac disease and refers to the reduced ability of the spleen to perform its immunological duties. While the exact reason for this remains a subject of clinical study, it is believed that long term, untreated inflammation and the autoimmune process itself can lead to a slight shrinkage or reduced activity of the organ. Because the spleen is responsible for producing antibodies and removing old or damaged blood cells, its reduced function means that certain bacteria can multiply more easily in the bloodstream. This makes individuals more susceptible to serious infections that the general population might otherwise be able to fight off more effectively.
Specific infections and the importance of vaccination
Due to the risks associated with hyposplenism, clinical guidelines in the UK recommend that individuals with coeliac disease receive extra protection through a specific vaccination schedule. According to the National Institute for Health and Care Excellence, clinicians should consider vaccinations for people with coeliac disease to protect against encapsulated bacteria. The most important of these is the pneumococcal vaccine, which protects against serious illnesses like pneumonia, septicaemia, and meningitis. Many GPs also recommend an annual flu jab and ensuring that the MenACWY and Hib vaccines are up to date. These preventative measures are a standard part of long term care to compensate for any reduced immune function.
How malabsorption affects immune strength
The damage to the small intestine in coeliac disease directly impacts the absorption of nutrients that are vital for a healthy and robust immune system. Deficiencies in iron, vitamin B12, and folate can lead to anaemia, which reduces the body’s general resilience and energy levels. A blood test is the first step used to help diagnose coeliac disease and identify nutritional deficiencies that may be hindering immune function. Vitamin D, in particular, is a known regulator of the immune response, and low levels are common in untreated coeliac patients. By strictly adhering to a gluten free diet, the gut can heal and begin to absorb these essential building blocks again, which significantly improves the body’s ability to defend itself against infection.
Conclusion
Coeliac disease can increase the risk of specific infections, primarily due to the potential for reduced spleen function and the impact of nutrient malabsorption on the immune system. Fortunately, these risks are well recognised in the UK, and patients are supported through targeted vaccination programmes and regular nutritional monitoring. Adhering to a strict, lifelong gluten free diet and keeping up to date with recommended immunisations are the best ways to maintain a strong and healthy immune system. If you experience severe, sudden, or worsening symptoms, call 999 immediately.
Why do I need the pneumococcal vaccine?
This vaccine protects against serious infections like pneumonia and meningitis, which can be more difficult for some coeliac patients to fight off.
Does everyone with coeliac disease have a weak spleen?
No, hyposplenism typically only affects a proportion of adults, and it is less common in children who are diagnosed early.
Will my immune system improve on a gluten free diet?
Yes, as your gut heals and your nutrient levels stabilise, your body will become more efficient at defending itself against illness.
Is it safe for me to travel abroad?
Yes, but you should ensure all your vaccinations are up to date and speak with your GP about any specific travel immunisations you might need.
Should I take immune boosting supplements?
You should only take supplements if blood tests confirm a deficiency and after discussing it with your GP or a specialist dietitian.
How do I know if my spleen is not working well?
Spleen function is not always tested directly, which is why UK guidelines recommend preventative vaccinations for all coeliac patients as a precaution.
Can children with coeliac disease have the same vaccines?
Children generally follow the standard UK childhood immunisation schedule, but you should discuss any additional needs with your paediatrician.
Authority Snapshot (E-E-A-T Block)
This article was developed by the Medical Content Team to provide clear, UK focused education on the infection risks associated with coeliac disease. The content has been reviewed by Dr. Rebecca Fernandez, a UK trained physician with experience in internal and emergency medicine, to ensure complete alignment with NHS and NICE clinical guidance. Our purpose is to help the general public understand the systemic impact of autoimmune health through factual and restrained reporting.
