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*[[Fungi]]
 
*[[Fungi]]
 
*[[Parasites]]- comprising [[protozoa]] and [[helminths]]
 
*[[Parasites]]- comprising [[protozoa]] and [[helminths]]
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A fifth, controversial, type, Pirons, are an infections protein that is believed to be the cause of bovine spongiform encephalopathy (BSE) and the human variant  Creutzfeldt–Jakob disease (vCJD).
    
All exist as either:
 
All exist as either:
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