Many, many modern illnesses can be avoided by living a healthy lifestyle. Parasitic infections are rife and not only in the gut, I won't scare you with details. I repeat myself far too often on pages like this, pages where DR's often share their knowledge, I'm no Dr ego, like many with their profile pic stethoscope and white coat. Do not eat raw meat or fish, wash your damn hands, eat only live foods, fruit and veg, wash them too, vacuum often, wash all touchable surfaces, clean your a r s e in the morning, every morning. Use cotton to clean your eyes. Keep your ears clean. Eat plenty of garlic and pepper, cut out sugars, Yeasts and processed crap. Use natural soap and moisturizer, stay away from smelly people and certainly do not allow them in your home, cut your nails short and clean and wash your clothes and fabrics often in a machine. If there's dust there's bugs, bugs carry blood, eggs, mites and anything under the sun that pisses people off.
You could have your stool tested {Doctors request needed} at www.metametrix.com and because they use DNA analysis testing instead of the most common lab test, if are parasites are there they will find it.
GI Effects Specimen Collection Kit - Stool (71860)
GI Effects Profiles use DNA analysis to identify microbiota - including anaerobes, a previously immeasurable area of the gut environment. In addition to much more comprehensive bacteriology, mycology, and parasitology, GI Effects Profiles report drug resistance genes, antibiotic and botanical sensitivities, gliadin-specific sIgA, Elastase1, plus other inflammation, digestion, and absorption markers clinicians requested.
From what I've recently read online (but I'm not a medical person or doctor, etc.) is that the small intestine can be the home for Garidia ... there is medicine you can take which my son recently started and his symptoms of severe pain (they thought gallbladder in the ER or bowel perforation) started to subside within 24hrs of the first pill! The lab samples have high false negative. Maybe ask about trying the medicine and see if it helps .... the other possibiity we were told is Celiac but remote in his case.
C~