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Eradication of tuberculosis from an extensively managed beef herd
Australian Veterinary Journal
|May 1, 1981
Summary
Eradicating bovine tuberculosis in a large beef herd was successful in five years using tuberculin testing and segregation. Overcoming anergy in tuberculous animals and preventing reinfection were key challenges.
Area of Science:
- Veterinary Medicine
- Animal Health
- Epidemiology
Background:
- Bovine tuberculosis (TB) poses a significant threat to cattle populations and food security.
- Long-standing infections in large herds present complex eradication challenges.
Purpose of the Study:
- To describe the successful eradication of tuberculosis from a large beef cattle herd.
- To identify key strategies and challenges in achieving herd TB eradication.
Main Methods:
- Implementation of the single caudal fold tuberculin test.
- Segregation of breeding cattle by age.
- Selective slaughter of identified problem groups.
- Complete herd slaughter when testing proved insufficient.
Main Results:
- Tuberculosis eradication was achieved within a 5-year period in a herd of 5,000 cattle.
- The tuberculin test was highly effective in cattle under two years of age.
- Anergy in tuberculous animals presented a major obstacle.
- Incomplete musters and segregation failures led to early reinfection.
Conclusions:
- A multi-faceted approach combining testing, segregation, and targeted culling can eradicate bovine TB.
- Addressing anergy and ensuring biosecurity are critical for successful eradication programs.
- Persistent vigilance and management are necessary to prevent re-emergence of infection.