A child is brought to the pediatric OPD with fever of 24 hours duration. History reveals 3 episodes of chest infection and passage of foul smelling stools. The most probable diagnosis is:

a. Cystic fibrosis(Ref: Nelson's 20/e p 2098-2112, Ghai 8/e p 393)High grade fever and chest infection along with passage of foul smelling stools suggests systemic disease.In cystic fibrosis because of pancreatic exocrine insufficiency, foul smelling stool is common.