In the severe form, symptoms include abdominal pain, profuse vomiting, lethargy, potentially diarrhea, and even shock. Additional symptoms could potentially include - but are not limited to - headache, pallor, lethargy, constipation, and abdominal swelling (distension). Laboratory studies might reveal hypoalbuminemia, anemia, eosinophilia, and an elevated white blood cell count with a left shift. Over half of patients experiencing an acute<unk>  reaction may develop thrombocytosis (platelets >500x109/L). In both chronic and acute<unk> , both methemoglobinemia and metabolic acidosis (mean pH around 7.03 in one study) have been reported. Endoscopy may reveal a gastric erythema, edema, mucosal friability, and gastric antral erosions. The exact mechanism is unclear, but it is hypothesized to be a T cell driven disorder. Upon re-exposure to the offending<unk>  after a period of elimination, a subacute<unk>  can present with repetitive emesis and dehydration.
Food protein-induced enterocolitis syndrome
Wilderness-acquired diarrhea
Congenital tufting enteropathy
Neutropenic enterocolitis
Staphylococcal enteritis
Necrotizing enterocolitis
Tropical sprue
Antibiotic-associated diarrhea