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Fatal degenerative neurologic illnesses in men who participated in wild game feasts--Wisconsin, 2002
Insights
Creutzfeldt-Jakob disease (CJD) is a rare, fatal neurologic disorder. An investigation found no link between CJD and chronic wasting disease (CWD) in deer, though continued surveillance is recommended.
Area of Science:
- Neurology
- Epidemiology
- Infectious Diseases
Background:
- Creutzfeldt-Jakob disease (CJD) is a fatal prion disease affecting the central nervous system.
- Prion diseases, or transmissible spongiform encephalopathies (TSEs), are caused by misfolded prion proteins.
- Concerns exist regarding the potential transmission of Chronic Wasting Disease (CWD) from cervids to humans.
Observation:
- Three men in Wisconsin died from degenerative neurologic illnesses after consuming wild game.
- An investigation was launched to determine if these deaths were linked to CWD.
- One confirmed case of CJD was identified among the three men.
Findings:
- The investigation did not establish an association between Chronic Wasting Disease (CWD) and Creutzfeldt-Jakob disease (CJD) in the studied cases.
- The deaths were attributed to various causes, with only one confirmed CJD case.
Implications:
- While no direct link was found, the study highlights the importance of ongoing surveillance for both CJD and CWD.
- Continued monitoring is crucial for assessing potential zoonotic risks and public health implications.
- Understanding prion disease transmission is vital for preventing future outbreaks.
Abstract:
Creutzfeldt-Jakob disease (CJD) is a fatal neurologic disorder in humans. CJD is one of a group of conditions known as transmissible spongiform encephalopathies (TSEs), or prion diseases, that are believed to be caused by abnormally configured, host-encoded prion proteins that accumulate in the central nervous tissue. CJD has an annual incidence of approximately 1 case per million population in the United States and occurs in three forms: sporadic, genetically determined, and acquired by infection. In the latter form, the incubation period is measured typically in years. Recent evidence that prion infection can cross the species barrier between humans and cattle has raised increasing public health concerns about the possible transmission to humans of a TSE among deer and elk known as chronic wasting disease (CWD). During 1993-1999, three men who participated in wild game feasts in northern Wisconsin died of degenerative neurologic illnesses. This report documents the investigation of these deaths, which was initiated in August 2002 and which confirmed the death of only one person from CJD. Although no association between CWD and CJD was found, continued surveillance of both diseases remains important to assess the possible risk for CWD transmission to humans.