Profuse watery diarrhoea in an immune compromised child is due to
Giardiasis caused by Giardia lamblia is a major cause of diarrhoea in children and travellers. Individuals with malnutrition,humoral immunodefeciencies,and cystic fibrosis are particularly susceptible.
Features: acute diarrhoea with sudden onset of explosive, watery foul smelling stools, along with nausea and anorexia,abdominal distension,flatulence,epigastric camps and mild fever.
Cryptococcus
Amoeba
Giardia
Lactose intolerance