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10 people killed by new CJD-like disease
Public release date: 9-Jul-2008 [ Print Article E-mail Article Close Window ]
Contact: Claire Bowles firstname.lastname@example.org 44-207-611-1210 New Scientist
10 people killed by new CJD-like disease A NEW form of fatal dementia has been discovered in 16 Americans, 10 of whom have already died of the condition. It resembles Creutzfeldt-Jakob disease - with patients gradually losing their ability to think, speak and move - but has features that make it distinct from known forms of CJD.
No one yet knows how the disease originates, or under what conditions it might spread. Nor is it clear how many people have the condition. "I believe the disease has been around for many years, unnoticed," says Pierluigi Gambetti, director of the US National Prion Disease Pathology Surveillance Center at Case Western Reserve University in Cleveland, Ohio. Cases may previously have been mistaken for other forms of dementia.
Since Gambetti's team wrote a paper describing an initial 11 cases referred to his centre between 2002 and 2006 (Annals of Neurology, vol 63, p 697), another five have come to light. "So it is possible that it could be just the tip of the iceberg," Gambetti says.
As in other spongiform encephalopathies, such as CJD and mad cow disease (BSE), the brain tissue of victims is full of tiny holes. This damage is thought to be caused by the accumulation of prions, misfolded versions of a brain protein called PrP that can convert normal PrP molecules into their own misshapen form.
Some features of the new disease are different, however. All known disease-causing prions resist degradation by proteases - enzymes which digest the normal form of PrP. But prions from patients with the new disease are broken down by the enzymes.
Some very rare forms of CJD run in families and are caused by mutations in the gene for PrP. Six of the cases described in Gambetti's paper were from families with a history of dementia, suggesting a genetic cause. However, these people had no mutations in their PrP genes. "Maybe there are other genes that have an influence on the disease," suggests James Ironside of the UK's National CJD Surveillance Unit in Edinburgh.
Most forms of CJD develop spontaneously, for unknown reasons, but can be spread if someone is exposed to brain material from people with CJD, for instance, by neurosurgery using inadequately sterilised instruments.
One variant of CJD has been linked to the consumption of contaminated meat from cattle with mad cow disease. If the new condition is similarly caused by something in the victims' diet, or another environmental cause, new measures might be needed to protect public health.
Gambetti is now conducting experiments in mice to see how the disease is transmitted. He suspects that there is no cause for alarm. "I believe the disease occurs naturally, and is not due to environmental causes," he says.
New Scientist Reporter: Andy Coghlan
IF REPORTING ON THIS STORY, PLEASE MENTION NEW SCIENTIST AS THE SOURCE AND, IF REPORTING ONLINE, PLEASE CARRY A LINK TO: http://www.newscientist.com
UK CONTACT - Claire Bowles, New Scientist Press Office, London: Tel: +44(0)20 7611 1210 or email email@example.com
Thursday, July 10, 2008
A New Prionopathy update July 10, 2008
Communicated by: Terry S. Singeltary Sr.
[In submitting these data, Terry S. Singeltary Sr. draws attention to the steady increase in the "type unknown" category, which, according to their definition, comprises cases in which vCJD could be excluded. The total of 26 cases for the current year (2007) is disturbing, possibly symptomatic of the circulation of novel agents. Characterization of these agents should be given a high priority. - Mod.CP]
There is a growing number of human CJD cases, and they were presented last week in San Francisco by Luigi Gambatti(?) from his CJD surveillance collection.
He estimates that it may be up to 14 or 15 persons which display selectively SPRPSC and practically no detected RPRPSC proteins.
JOURNAL OF NEUROLOGY
MARCH 26, 2003
RE-Monitoring the occurrence of emerging forms of Creutzfeldt-Jakob
disease in the United States
Email Terry S. Singeltary:
I lost my mother to hvCJD (Heidenhain Variant CJD). I would like to comment on the CDC's attempts to monitor the occurrence of emerging forms of CJD. Asante, Collinge et al  have reported that BSE transmission to the 129-methionine genotype can lead to an alternate phenotype that is indistinguishable from type 2 PrPSc, the commonest sporadic CJD. However, CJD and all human TSEs are not reportable nationally. CJD and all human TSEs must be made reportable in every state and internationally. I hope that the CDC does not continue to expect us to still believe that the 85%+ of all CJD cases which are sporadic are all spontaneous, without route/source. We have many TSEs in the USA in both animal and man. CWD in deer/elk is spreading rapidly and CWD does transmit to mink, ferret, cattle, and squirrel monkey by intracerebral inoculation. With the known incubation periods in other TSEs, oral transmission studies of CWD may take much longer. Every victim/family of CJD/TSEs should be asked about route and source of this agent. To prolong this will only spread the agent and needlessly expose others. In light of the findings of Asante and Collinge et al, there should be drastic measures to safeguard the medical and surgical arena from sporadic CJDs and all human TSEs. I only ponder how many sporadic CJDs in the USA are type 2 PrPSc?
THE PATHOLOGICAL PROTEIN
Hardcover, 304 pages plus photos and illustrations. ISBN 0-387-95508-9
BY Philip Yam
CHAPTER 14 LAYING ODDS
Answering critics like Terry Singeltary, who feels that the U.S. under- counts CJD, Schonberger conceded that the current surveillance system has errors but stated that most of the errors will be confined to the older population.
Diagnosis and Reporting of Creutzfeldt-Jakob Disease Singeltary, Sr et al. JAMA.2001; 285: 733-734. Vol. 285 No. 6, February 14, 2001 JAMA
Diagnosis and Reporting of Creutzfeldt-Jakob Disease
To the Editor: In their Research Letter, Dr Gibbons and colleagues1 reported that the annual US death rate due to Creutzfeldt-Jakob disease (CJD) has been stable since 1985. These estimates, however, are based only on reported cases, and do not include misdiagnosed or preclinical cases. It seems to me that misdiagnosis alone would drastically change these figures. An unknown number of persons with a diagnosis of Alzheimer disease in fact may have CJD, although only a small number of these patients receive the postmortem examination necessary to make this diagnosis. Furthermore, only a few states have made CJD reportable. Human and animal transmissible spongiform encephalopathies should be reportable nationwide and internationally.
Terry S. Singeltary, Sr Bacliff, Tex
1. Gibbons RV, Holman RC, Belay ED, Schonberger LB. Creutzfeldt-Jakob disease in the United States: 1979-1998. JAMA. 2000;284:2322-2323. FREE FULL TEXT
2 January 2000 British Medical Journal U.S. Scientist should be concerned with a CJD epidemic in the U.S., as well
15 November 1999 British Medical Journal vCJD in the USA * BSE in U.S.
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Creutzfeldt Jakob Disease
USA PRION UNIT BLOG
Sunday, April 20, 2008 Progress Report from the National Prion Disease Pathology Surveillance Center April 3, 2008
Atypical forms of BSE have emerged which, although rare, appear to be more virulent than the classical BSE that causes vCJD.
see full text ;
CJD TEXAS (cjd clusters)
USA WRITTEN CJD QUESTIONNAIRE ???
The statistical incidence of CJD cases in the United States has been revised to reflect that there is one case per 9000 in adults age 55 and older. Eighty-five percent of the cases are sporadic, meaning there is no known cause at present.
Friday, June 20, 2008
USDA TO KOREA AND THE WORLD, EAT THAT AND LIKE IT
A novel human disease with abnormal prion protein sensitive to protease (prionopathy)
Terry S. Singeltary Sr. P.O. Box 42 Bacliff, Texas USA 77518
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