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Transmissible spongiform encephalopathies in ruminants
Jeff W Tyler1, John R Middleton
1Department of Veterinary Medicine and Surgery, University of Missouri, 379 East Campus Drive, Columbia, MO 65211, USA. tylerj@missouri.edu
Summary
Transmissible spongiform encephalopathies (TSEs) affect North American livestock and cervids, caused by misfolded proteins. This study reviews TSE diagnosis in ruminants and regulatory control strategies.
Area of Science:
- Veterinary Neurology
- Protein Misfolding Diseases
- Animal Health Regulations
Background:
- Transmissible spongiform encephalopathies (TSEs) are neurodegenerative diseases affecting various animal species.
- These diseases are characterized by the accumulation of misfolded proteins, leading to severe neurological dysfunction.
- TSEs have been identified in North American sheep, cervidae, and cattle populations.
Purpose of the Study:
- To present the diagnostic approach for TSEs specifically in ruminants.
- To outline the historical development and rationale behind regulatory programs aimed at controlling and eradicating TSEs.
- To consolidate information on TSEs in North American animals.
Main Methods:
- Review of diagnostic methodologies for TSEs in ruminants.
- Historical analysis of regulatory program implementation and justification.
- Compilation of data on TSE prevalence and affected species in North America.
Main Results:
- Common clinical signs include chronic weight loss and progressive neurological decline.
- Protein conformational changes are implicated as the causative agent.
- Transmission mechanisms differ across various host species.
Conclusions:
- Effective diagnostic strategies are crucial for managing ruminant TSEs.
- Regulatory programs are essential for the control and eradication of TSEs.
- Understanding transmission is key to preventing further spread in animal populations.