Also, wouldn't a colonoscopy reveal  parasites?  I had one 3 years ago that was 
fine, but they did find  a "harmless" cyst in the liver.  I couldn't find 
anything about  parasites on Medscape except about Mexican immigrants and  
Africans.  If they're so prevalent, surely gastroenterologists  would be 
concerned.
  
                                                                        Pat 
  

                
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