WHEN David Pritchard travelled to Papua New Guinea to investigate a parasitic worm, he soon noticed something odd about the infected people around him: they never seemed to get ill.
The blood-sucking hookworms seemed to make people healthier.
He did not realise it during his visit in the 1980s, but Professor Pritchard was taking the first step on a journey that was to lead to the discovery of a treatment that might change the lives of millions of people with auto-immune illnesses, such as hay fever and multiple sclerosis.
Earlier this year in Nottingham, Prof Pritchard received a shipment of Necator americanus for a worldwide first trial using hookworms as a treatment for auto-immune diseases, in which the immune system goes into overdrive.
Initial results presented yesterday to the British Association for the Advancement of Science's conference in York, show that the hookworms appear to "down regulate" the immune system.
Trials with hay fever sufferers confirmed that the hookworms stimulate the body to produce white blood cells called regulatory T-cells, that dampen down the immune response. Volunteers are being recruited for a second trial with asthma sufferers and there are plans for studies on Crohn's disease and multiple sclerosis.
Prof Pritchard, who has infected his body with 50 hookworms, said yesterday said asthma tended to be concentrated in the developed world.
Source - Scotsman