The comparison with the holocaust is so silly that it does not really warrant a serious comment.
My holocaust response was in comparison to someone saying "That’s merely your assertion. I could equally assert that there is next to no evidence for this ‘disease’ because it isn’t real and there is nothing physiological to study in the first place." Which is the exact argument that Holocaust deniers use - point being anyone can deny the existence of evidence.
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The point of this is is that there is a misconception that there is no evidence. This is plain and simply not true. This misconception comes from doctors that refused to even look at the evidence the moment the patient said that blue fibers came form there body and they have evidence. When scientists actually do look at the fibers three interesting facts emerge:
1) The samples from different individuals from different regions of the country submit remarkably similar samples.
2) These samples are not textiles or fibers one can find in homes or clothing.
3) There is indication that these fibers are cellulose.
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You said: "Second, to date not a single animal pathogenic Agrobacterium species is known. The way they infect plants is pretty unique and does not easily apply to animal tissues. I am not saying that it is clear that this disease doesn't exist, but the quoted hypothesis is pretty much unfounded based on the pictures."
Well my hypothesis is that this disease looks like a likely candidate for genetic modification. If genetic modification is involved then that would explain something as bizarre as agrobacterium affecting animal tissue. (whatever the case with this disease it is very different than any other disease I've ever heard of). I see a similarity between the pictures, thats subjective. There is some evidence from the scientists that the fibers are cellulose and some evidence linking it with agrobacterium.