Volume 11, Number 9—September 2005
Research
Variant Creutzfeldt-Jakob Disease Death, United States
Table
Estimated range of incubation periods for variant Creutzfeldt-Jakob disease cases with presumed route and year of exposure*
Presumed route of exposure and country of residence† | Period of potential BSE/vCJD exposure | Estimated range of incubation period (y) |
---|---|---|
Foodborne | ||
Canada | 1987–1990 | 11–14 |
Ireland | 1989–1995 | 5–10 |
Japan‡ | 1989 | 12 |
United Kingdom (Leicestershire, England) | 1980–1985 | 10–16 |
United States | 1980–1992 | 9–21 |
Bloodborne | ||
United Kingdom | 1996 | 6.5 |
United Kingdom§ | 1999 | >5 |
*BSE/vCJD, bovine spongiform encephalopathy/variant Creutzfeldt-Jakob disease.
†Estimated range of incubation periods are based on a single vCJD case except for Leicestershire, England, where the Leicestershire Health Authority reported the estimated incubation period for a cluster of 5 vCJD cases.
‡Patient was reported to have stayed in the United Kingdom ≈24 days.
§Patient with presumed bloodborne transmission died of a nonneurologic disease. The presence of the vCJD agent was detected in the spleen and cervical lymph node; the patient was heterozygous for methionine and valine at the polymorphic codon 129 of the prion protein gene.