Diagnosis: Characterized by severe malabsorption and secretory diarrhea, and is differed from celiac disease on small bowel biopsy by the decreased numbers or absence of surface intraepithelial lymphocytes, apoptotic bodies present in the intestinal crypts and absent goblet and Paneth cells

a) Whipple's disease
b) Tropical sprue
c) Autoimmune enteropathy
d) Eosinophilic gastroenteritis