<prompt> Intractable diarrhoea in children is caused by all except-Cystic fibrosisGiardiasisSecreting tumorsMilk allergy  <response>: Ans. is b i.e., Giardiasis Intractable diarrhea o Intractable diarrhea is defined as, chronic or recurring diarrhea not obviously or early diagnosed as to etiology. o Chronic diarrhea is defined as diarrhea lasting 4 weeks. Intractable diarrhea is caused by ? o Cystic fibrosis o Congenital enterokinase Trypsinogen deficiencies o Bile duct atresia o Food protein sensitivity Cows milk protein intolerance o Abetalipoproteinemia o Carbohydrate intolerance o Secretory diarrhoea o Diarrhoea due to exocrine pancreas deficiency Giardiasis causes infectious type of diarrhea which responses to antiprotozoal therapy. 