... Why get tested?
To detect cystic fibrosis (CF) genetic mutations to establish CF carrier status or to establish the diagnosis of CF in an individual

When to get tested?
When a newborn infant has meconium ileus (no stools in the first 24 to 48 hours of life) or when a person has symptoms of CF (salty sweat, persistent respiratory infections, wheezing, persistent diarrhea, foul-smelling greasy stools, malnutrition, and vitamin deficiency); if a person has a positive sweat chloride or IRT test or a close relative who has been diagnosed with CF; when a patient is undergoing genetic counseling and wants to find out if they are a CF carrier; or for prenatal diagnosis

Sample required?
A blood sample drawn from an infant’s heel; a spot of blood that is put onto filter paper; or a blood sample drawn from a vein in the arm
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