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dsDNA (Crithdia)

Category Immunology and PRU
Reporting frequency Weekly

Additional information

Possible clinical association – Diagnosis and monitoring of SLE. Specimens showing a positive ANA will be tested for antibodies to appropriate specific antigens; homogeneous patterns will typically be tested for antibodies to double stranded DNA and speckled patterns will typically be tested for antibodies to the extractable nuclear antigens (RNP, Sm, SSA, and SSB). Other antigen specificities will be tested depending upon the clinical details or if specifically requested.Reference range: Negative <30 IU/mL, Positive >30 IU/mLThis is a follow-on test that is added on where appropriate, according to the antinuclear antibody (Hep2) results, or by direct request to a Consultant on 0208 725 5106.

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Latest news

October 23, 2025

Clinical biochemistry reference range changes

South West London Pathology (SWLP) is introducing new Beckman Coulter biochemistry analysers to it’s blood sciences laboratories across the whole SWLP network. This post includes the reference range changes for Croydon, Kingston and St George’s Hospital. Details of the changes for Epsom and St Helier hospitals will be added soon.

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October 2, 2025

Celebrating the grand opening of state-of-the-art laboratories in Microbiology

It was a day of immense pride and celebration at South West London Pathology (SWLP) as it officially opened its spectacular new bacteriology and molecular laboratories. Trust Managing Director Kate Slemeck was invited to officially open the two new laboratories to mark this significant milestone in SWLP’s ambitious journey of transformation.

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September 2, 2025

From dissertation to duty: Comms lead masters the balancing act for NHS leadership

For Anna Parley, Communications and Marketing Lead at SWLP, achieving a Master of Science (MSc) degree was more than an academic milestone; it was a two-year lesson in juggling a pivotal NHS role, family life, and the intense demands of postgraduate study. Her recent graduation stands as a testament to dedication, a robust support network, and a reaffirmed belief in modern, empowering leadership within the NHS.

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August 20, 2025

Clinical biochemistry reference range changes 2025

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