« | Home | »

Testing for vCJD

Tags:

In 1997, I did a research project at the National CJD Research and Surveillance Unit at Edinburgh’s Western General Hospital, supervised by Robert Will and James Ironside, who co-authored the 1996 paper in the Lancet that proposed the existence of vCJD in the UK. The only reliable way to diagnose the disease was by post-mortem examination of the brain, which would reveal the tiny holes in the brain tissue caused by massive cell death – giving it a sponge-like appearance – and allow us to test for the presence of abnormal proteins.

By the end of 1997 there had been 23 confirmed cases of vCJD. The big question was whether this was the start of an epidemic. In similar diseases, such as kuru, there could be a gap of up to forty years between infection and first presentation of symptoms. For once, the media’s scaremongering – Will and Ironside faced a daily barrage of phone calls from journalists – had some scientific foundation.

The number of confirmed cases of vCJD increased over the following few years – in part perhaps because of greater awareness and improved screening methods – but not by much. In all, so far, there have been 176 cases. Still, if vCJD has an average incubation time of 15 or 20 years, we could still be in the shallow part of the epidemiological curve.

The development of a blood test for vCJD was published in the Lancet a year ago. Last week Channel 4 News revealed that the test is now available for use in the UK. There is still no treatment for any form of CJD, but if the test is effective – researchers don’t yet know what the false positive rate is – it should be possible at least to establish more accurately how many carriers there are in the UK: current estimates, based on tonsil biopsies, put the number at 1 in 4000, or a total of 15,000.

Comment on this post

Log in or register to post a comment.


  • Recent Posts

    RSS – posts

  • Contributors

  • Recent Comments

    • IPFreely on Nuclear Footballs: According to usually reliable sources, before he became president Trump enquired several times about the availability of nuclear weapons and the presi...
    • Monteville on ‘I can taste the smoke’: It is too soon to demolish the building. The forensic investigation is still going on. There has been a proposal to cover the building, eventually, wi...
    • ksh93 on Nuclear Footballs: A recent article in the Bulletion of Atomic Scientists seems to indicate that late model US nukes have reduced reaction time for Kremlin which is like...
    • Matias Carnevale on Run-ins with the Gatekeepers: I translated his Autogeddon into Spanish last year. He was always witty, respectful and generous in our communication. My condolences to his family an...
    • kadinsky on ‘I can taste the smoke’: The PM mouths regret at 'the initial response' [ie, *my* initial response], praises the emergency services, and vows that everything will be done to b...

    RSS – comments

  • Contact

  • Blog Archive

Advertisement Advertisement