Maybe the original idea was made by people so young, or older people with selective memory loss, that they are woking with very clean animals, which animal houses now are.
However, before the 1980s University animal houses were fizzing with infections (e.g. pinworm and viruses) and I can remember counting the number of live worms coming from the pooh of the animals. Did that stop animals getting EAE....well no. Did those woms not make a TH2 response. (I have heard Protagonists re-write history saying that in the bad old days you could not get EAE to work in worm-infected animals). Will the TH2 switch stop MS..Let's see, I may have to eat it. However I personally think Th1= BAD and Th2 = BAD, you don't want either.
If the original study from Argentina repeats itself then the trial will show that there are less MRI lesions in people given hookworms (will 25 be enough), but will it be 90% reduction seen with pharmaceutical DMT. If it isn't will this be seen as being positive. Surely we will find out at ECTRIMS2016 or before....
P.S. Has the rate of Hookworm infection increased in the Nottingham area:-)