Newborn Screening for GALT Deficiency (Classic Galactosemia)- Why Early Detection is Important?

Newborn Screening for GALT Deficiency (Classic Galactosemia)- Why Early Detection is Important?

Newborns can appear to be in perfect health during their first days of life. The infant shows normal development because both feeding and sleeping patterns are established. A hidden genetic condition starts to develop in some infants immediately after their first feed.

Classic galactosemia develops when the body lacks the GALT enzyme needed for its function. The condition becomes life-threatening without newborn screening because it leads to rapid deterioration.

What is GALT Deficiency (Classic Galactosemia)?

GALT deficiency is a rare inherited metabolic disorder where the baby’s body is unable to properly process galactose, a sugar found in milk (including breast milk and formula).

The enzyme galactose-1-phosphate uridyltransferase (GALT) normally converts galactose into its active form. In affected babies:

• The enzyme is either completely absent or significantly reduced.
• Harmful substances begin to accumulate in the bloodstream.
• Vital organs, including the liver, brain, and eyes, may begin to sustain damage.
• The condition can start causing harmful effects soon after birth, as milk is the primary dietary source for infants.

What Happens If It Goes Undetected?

The situation becomes critical at this point.

A baby with GALT deficiency who drinks milk without knowing his condition will develop symptoms within a few days, which include:

• The baby refuses to feed.
• The baby experiences vomiting and diarrhea.
• Yellowing of the skin and eyes may occur.
• The baby becomes excessively sleepy.

The condition will progress to the following outcomes without immediate medical intervention:

• The liver will stop functioning.
• The patient will develop severe infections, including E. coli sepsis.
• The patient will experience developmental delays.
• The patient will develop cataracts.
• The condition can result in death under extreme circumstances.

The most concerning part? Parents notice nothing wrong until their child begins to develop severe symptoms that reach critical levels.

How Newborn Screening Detects It Early?

A small blood sample is collected through heel prick from newborns between 24 and 48 hours after their delivery.

The laboratory conducts tests to detect various metabolic disorders, starting with GALT deficiency.

Screening helps in:

• The test evaluates the level of enzyme activity present.
• The test identifies abnormal blood components, including galactose metabolites.

Abnormal results require:

• The laboratory performs confirmation tests right after receiving the results.
• Health practitioners begin treating the patient immediately after test results are available.
• The detection capability enables identification of medical conditions before their visible symptoms develop.

What is the Treatment After Detection?

Treatment requires simple procedures that need urgent execution.

The medical team immediately initiates treatment through a galactose-free diet, which includes:

• The doctor approves special formulas that do not contain lactose or soy.
• The patient must entirely stop milk and all dairy items.
• The baby will experience normal development because dietary management prevents harmful substances from accumulating while safeguarding vital body organs.
• The treatment will not reverse the permanent effects that result from a delayed diagnosis.

Why Awareness of GALT Screening is Important in India?

Newborn screening programs have not yet been fully implemented across India. The majority of parents remain ignorant about galactosemia because:

• The babies show a normal health status at birth.
• The symptoms of the condition imitate regular newborn medical conditions.
• The medical tests are not available at all healthcare facilities.
• The absence of knowledge about this disease leads to delayed diagnosis because medical professionals do not recognize symptoms that require immediate attention.

A Simple Newborn Screening Test That Saves Lives

The GALT deficiency test conducted through newborn screening achieves excellent results while ensuring safety, speed, and a high success rate.

The process enables medical professionals to transform a condition that threatens lives into a health problem that they can control through early identification.