M11 Pe118- Cystic fibrosis

Q: In a child with respiratory distress, failure to thrive, the sweat chloride levels were estimated to be 35 meq/l and 41 meq/l. What is the next best to do:

(a) Nasal transmembrane potential difference
(b) DNA analysis of F 508 mutation
(c) CT chest
(d) 72 hour fecal fat estimation.


                                                                                                   A: a. Nasal .....

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