The goal of treatment of the infant with phenylketonuria (PKU) is to:
a. Cure mental retardation.
b. Prevent central nervous system (CNS) damage, which leads to mental retardation.
c. Prevent gastrointestinal symptoms.
d. Cure the urinary tract infection.
ANS: B
CNS damage can occur as a result of toxic levels of phenylalanine. No known cure exists for mental retardation. Digestive problems are a clinical manifestation of PKU. PKU does not involve any urinary problems.
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