Posted 11/19/2009 12:25 AM (GMT 0)
Just to correct:
Tysabri does not "break down" the blood-brain barrier. For some reason, it seems to allow the JC virus (present in up to 86% of the population, but normally dormant) to become active and result in PML. PML is usually fatal, but not always. Very few patients have acquired PML, and certainly not all who have been on it for over two years. The vast majority of those who contracted PML also had concomitant use of other immunomodulators which is why Tysabri is now indicated as a monotherapy.
I do believe that fresh food is incredibly important, I don't particularly blame it for Crohn's. See the current incidence rates for Crohn's (Note that the U.S. and Europe are essentially the same. Other literature puts the U.S in the range of 1-10 per 100,000. Additionally, note the north south gradient of Crohn's which I've mentioned previously in other threads. Interesting.):
United States
The prevalence of Crohn disease is approximately 7 cases per 100,000 population.1 The incidence and the prevalence of Crohn disease (especially the colonic subset) seem to have steadily increased over the last 5 decades, mainly in northern climates.
International
Incidence rates in Europe range from 0.7 to 9.8 cases per 100,000 persons. Rates in Asia range from 0.5 to 4.2 per 100,000. The lowest recorded rates of new cases appear to be in South Africa (0.3-2.6 per 100,000) and Latin America (0-0.03 per 100,000) respectively.1,2