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Researchers test for cattle disease link in Crohn's patients

Story supplied by LU Press Office

The project is examining the link between Crohn's Disease and harmful bacterium MAP which is found in cattle and other animals The project is examining the link between Crohn's Disease and harmful bacterium MAP which is found in cattle and other animals

​Researchers at Lancaster University and the Centre for Ecology & Hydrology (CEH) are investigating the cause of a debilitating, painful condition which is on the increase, particularly among children in the UK.

Professor Roger Pickup, Chair of Biomedical and Life Sciences, is leading research at Lancaster University in collaboration with Dr Glenn Rhodes at CEH and Dr Andrew Higham at Royal Lancaster Infirmary. The project is examining the link between the inflammatory bowel condition Crohn's Disease and a harmful bacterium called Mycobacterium avium subspecies paratuberculosis (MAP), which causes Johne's disease in a wide range of animals. Johne's disease is particularly prevalent in sheep and cattle and has many similarities with Crohn's Disease.

Crohn's disease is an incurable condition which causes suffering in increasing numbers of the UK population. Sufferers experience mild to severe inflammation and damage to the digestive tract. Recent research has shown that most people with chronic inflammation of the intestine of the Crohn's disease type are infected with MAP. In some studies 96 per cent of Crohn's disease patients were found to carry MAP. Like Johne's disease, the incidence of Crohn's disease is increasing. MAP is significantly associated with Crohn's Disease but is not accepted as causal.

University Hospitals of Morecambe Bay NHS Foundation Trust is leading on the research for the NHS, and there are plans to invite other trusts in the North Lancashire and Cumbria network to take part in the study.

In an NHS-funded project, researchers, working with hospitals in Cumbria and Lancashire, will analyse samples taken from patients attending routine gastroenterology clinics who are suffering from inflammatory bowel disease - including Crohn's Disease, ulcerative colitis and irritable bowel syndrome.

Researchers will examine these samples to establish whether the patients test positive for MAP.

These tests will be compared with control samples taken from other patients to see if a higher proportion of the Crohn's Disease sufferers are carriers of the bacterium. The bacterium will also be isolated from patients and compared to animal sources in the region to examine further the link between environment and human health. They will also examine environmental factors that may influence infection. In parallel, patients will fill in a questionnaire that will help determine the environmental risk factors associated with this disease.

Professor Pickup said: "Many patients with Crohn's Disease endure years of suffering, some find treatment which helps keep them in remission, but not all. It is particularly worrying that increasing numbers of children are being diagnosed with the condition, which as yet has no cure. It is a public health tragedy which urgently needs to be addressed.

"It is vitally important that we investigate all the possible contamination routes - from the moisture in the air we breathe to the milk we drink - to fully test the hypothesis that MAP may constitute a significant and incremental threat to human health."

Wed 14 March 2012