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A B C D E F G H I J K L M N O P Q

Test Identifier Information

 
Registration CodeDDNA
Method

RIA assay

External Price$28.79(Exclusive of GST)
  

Specimen Collection

 
Pre-Testing Requirements

None

Specimen Collection Protocols

Manufacturer's instructions state only serum may be used for this assay.

Patient Specimen5 mL clotted blood (Red)
Paediatric Specimen0.5 mL clotted blood (Red)
Sample Delivery to LabRoom temperature
  

Instructions for Referral to CHLabs

 
Aliquot Instructions100 uL serum - minimum 1 mL serum - preferred Store in fridge
Aliquot Transport to CHLRoom temperature
  

CHLabs Laboratory

 
DepartmentBiochemistry - Immunology
Contact Details Email Email
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Contact Phone Number(03) 364 0414 | x80414
Test AvailabilityBatched at least weekly
Turnaround Time1 week
Reference Interval

0 - 7 IU/mL

Interpretation

Double Stranded DNA Antibodies (RIA Assay)
This assay measures high affinity antibodies. Other assays (ELISA and Crithidia) detect low and/or high affinity antibodies. High titre high affinity antibodies are diagnostic of SLE. Rises of 50% or greater may be predictive of disease relapse in individual patients, especially when used in conjunction with C3 and C4 levels.

This assay was originally called the FARR assay.

Additional Information

Interferences:

The following blood components do not have a significant effect (± 20% of expected) on the test results up to the stated concentrations below.

Haemoglobin
1.03 mmol/L     (4.0 mg/mL)
Bilirubin
85.5 µmol/L      (0.5 mg/mL)
Triglyceride
3.4   mmol/L     (30 mg/mL)

 
Delphic Number Test Number6855

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