The idea is that worms tone down the immune system so they
dont get expelled . Hyperclean enviornments mean no worms and a
hyperactive immune system which destroys the gut .

excerpt

Diet of Worms Can Cure Bowel Disease  The idea that parasites can
actually be helpful in treating IBD has been talked about for a few
years but mostly in theory or in studies that used very small samples.
Well, another much larger study will soon be released that shows
remarkable success in inducing remission in both Crohn's and Colitis.
There is even a firm in Europe that is planning to launch a drink that
could be used in treatment. This is one area of research to watch.
http://www.newscientist.com/news/news.jsp?id=ns99994852 Frank van
Kolfschooten
April 6, 2004
Regular doses of worms really do rid people of inflammatory bowel
disease. The first trials of the treatment have been a success, and a
drinkable concoction containing thousands of pig whipworm eggs could
soon be launched in Europe.
At the moment the concoction cannot be stored for long, so doctors or
hospitals would have to prepare fresh batches of the eggs for their
patients. But a new German company called BioCure, whose sister
company BioMonde sells leeches and maggots for treating wounds, hopes
it will soon solve the storage problem.
It plans to launch a product called TSO, short for Trichuris suis ova.
Chief executive Detlev Goj says the company will apply for approval by
the European Agency for the Evaluation of Medicinal Products as soon
as the product is ready.
The pig whipworm was chosen as it does not survive very long in
people. Patients would have to take TSO around twice a month. The
human whipworm, which infects half a billion people, can occasionally
cause problems such as anaemia.
The latest trials, carried out in the US, involved 100 people with
ulcerative colitis and 100 with Crohn's disease, both incurable and
potentially serious diseases collectively known as inflammatory bowel
disease.
Remission rateIn many of the volunteers the symptoms of IBD, such as
abdominal pain, bleeding and diarrhoea, disappeared. The remission
rate was 50 per cent for ulcerative colitis and 70 per cent for
Crohn's, says gastroenterologist Joel Weinstock of the University of
Iowa, who devised the treatment.
"A lot of researchers couldn't believe this treatment was effective,
but people are always sceptical when confronted with new ideas,"
Weinstock says. He will announce the results in May at a conference in
New Orleans, and full details will soon be published. "With our new
impressive results, we can come out of the closet," he says.
The trials follow the success of a pilot study, revealed by New
Scientist in 1999. Weinstock came up with the idea of using worms to
treat IBD after noticing that the sharp rise in the disease over the
past 50 years in western countries coincided with a fall in infections
by parasites such as roundworms and human whipworms. IBD is still rare
in developing countries where parasitic infections remain common.
Weinstock's theory is that our immune systems have evolved to cope
with the presence of such parasites, and can become overactive without
them