Gal-1-P-Uridyltransferase | KK Women's and Children's Hospital

Specimen Container

1. Lithium heparin tube 

(To be obtained from DPLM Client Services, after office hour call extension 1352)

2. Guthrie card

Specimen Requirement

1. Lithium heparin tube 

Whole blood (0.5 mL). Do not combine test with other tests.

2. Guthrie card

3 well collected blood spots

Specimen Storage/Transport

1. Lithium heparin tube 

Do not freeze. Do not spin and separate plasma.

2. Guthrie card

Send blood cards in envelope to Lab.

Orderable as Urgent?

Turn Around Time

2 days

Testing Laboratory Location

KKH

Laboratory

Biochemical Genetics Lab

Contact Number

6394 8728

Day and Time Performed

Mon – Fri: 0900 hrs – 1800 hrs
Last specimen reciept time is at 1730 hrs.

Orderable on CPOE?

Yes

Downtime Form

Biochemical Genetics Lab

Additional Information

Useful For	The screening test aims to identify homozygote GALT deficient patients.
Clinical Indication	Progressive symptoms after start of milk feeds Vomiting Diarrhoea Jaundice
Interpretation	This test comprises of 3 assays: GALT enzyme activity, Total Galactose and Galactose. Results are interpretated together. Reduced GALT activity may be consistent with carrier status or Duarte variant galactosemia. Normal GALT activity with elevated total galactose and/or galactose requires further investigation for epimerase or galactokinase deficiency.

For URGENT analysis, contact the Biochemical Genetics laboratory at 6394 8728 or the Lead Scientist at 8388 8741 to discuss.

Store the whole blood sample in the reception fridge at 4°C if the whole blood is received after office hours.

Change History Notes

21 Aug 2026 10:17 AM

Updated Specimen Container, Specimen Requirement, Specimen Storage/Transport, Interpretation.
09 Feb 2023 05:10 PM

Update specimen container lithium heparin to be obtain at DPLM Client Services

Back: eLab Book (Test Catalogue)

Last Updated - 21 Aug 2026