I have been struggling with this for a while. The doctor as usual could not find anything. They did the stool tests and negative, x-ray since they thought it is a blockage. She had difficulty breathing, until she passed that long thing on January 7. I am taking her to the infectious disease specialist on Thursday. We will go from there. I don't know may be eventually we need to do endoscopy or colonoscopy. I thinkg stool tests are going to be useless. I need to ask for blood test for antibodies. Very frustrating.