By the way - What is EMC? EMC - a definition. EMC means nothing more than an electronic or electrical product shall work as intended in its environment. The electronic or electrical product shall not generate electromagnetic disturbances, which may influence other products. In other words, EMC deals with problems of noise emission as well as noise immunity of electronic and electrical products and systems.
Clostridium difficile (C. difficile) is a type of bacteria that is associated with diarrhea resulting from antibiotic use. C. difficile testing and C. difficile toxin tests identify the presence of these bacteria and detect the toxins produced by them.
Possibilities include gastritis, peptic ulcer disease, pancreatitis, splenic pathology or continuing Clostridium infection. In addition to the ultrasound you had, other tests to consider include amylase/lipase (to evaluate the pancreas), CT scan, and endoscopy (to evaluate for gastritis/peptic ulcer disease.