Robertsmorcom,
When my son was young, if he ever got sick, kinda affected his poo, but was never a stand out then. When he was 5 he had bronchitis and the antibiotic gave him diarrhea. After a month or two...still diarrhea. Pediatrician started doing stool tests for C diff...all negative. Diarrhea continued and after trying everything like acidophillus, probiotics, toast, bananas...etc we were at 5 months of this, pediatrician sent us to a GI. Right off they thought he looked small and were concerned about celiac or crohns. They did labs and then colonoscopy and said 'maybe' crohns. As I said earlier, I was in a bit of denial. I thought the antibiotic had done the damage. He didn't have many ulcers, no lack in energy, no abdominal pain, etc. I thought the drugs were making him worse, so I started him on gluten free diet and weaned him off the sulfasalazine. He went into remission.(They are puzzled by this but say maybe the drugs put him in remission and timing was coincidental) 3 years later it reared its ugly head again after he battled a virus and the frequent diarrhea came back, this time he was cramping. (He didn't cramp or have diarrhea during those 3 years, but we were noticing that the other 10 yr old boys were having growth spurts and he was not).