Evaluation of a state-wide neonatal screening programme

Area of Science:

• Medical Genetics
• Neonatal Screening
• Public Health Programs

Background:

• Established newborn screening for phenylketonuria in South Australia.
• Expanded screening to include galactosaemia, homocystinuria, hereditary tyrosinaemia, histidinaemia, maple syrup urine disease, and alpha 1-antitrypsin deficiency.
• Subsequently added hypothyroidism screening.

Purpose of the Study:

• Evaluate the utility of expanded newborn screening tests.
• Assess the effectiveness and impact of adding new screening panels.
• Determine which screening tests provide clinical benefit.

Main Methods:

• Retrospective analysis of screening program data.
• Inclusion of galactosaemia, homocystinuria, hereditary tyrosinaemia, histidinaemia, maple syrup urine disease, alpha 1-antitrypsin deficiency, and hypothyroidism.
• Monitoring of detection rates, repeat sample requests, and patient outcomes.

Main Results:

• Galactosaemia and hypothyroidism screening proved beneficial additions.
• Hereditary tyrosinaemia and alpha 1-antitrypsin deficiency screening led to repeat samples, anxiety, and no patient benefit.
• Homocystinuria, maple syrup urine disease, and histidinaemia were not effectively detected or yielded low detection rates.

Conclusions:

• Galactosaemia and hypothyroidism screening are valuable components of the South Australian newborn program.
• Screening for hereditary tyrosinaemia, alpha 1-antitrypsin deficiency, maple syrup urine disease, and histidinaemia was discontinued due to lack of benefit.
• Current newborn screening in South Australia includes phenylketonuria, hypothyroidism, galactosaemia, and homocystinuria.