12th August 2020

A 6-day old baby undergoes a sweat test after their heel prick blood test showed a raised level of immunoreactive trypsinogen

A 6-day old baby undergoes a sweat test after their heel prick blood test showed a raised level of immunoreactive trypsinogen and two mutations of the CTFR gene were found. In the sweat test, which concentration of chloride is diagnostic of Cystic Fibrosis?

Select the SINGLE most appropriate option from the list below. Select ONE option only.