Controlling Bovine Tuberculosis: Biosecurity, Surveillance, and Herd Health Strategies

Bovine tuberculosis (bTB) continues to challenge cattle production systems worldwide due to its impact on animal health, productivity, and public health. For practicing veterinarians, disease control extends beyond diagnosing individual cases. Effective management requires a herd-level approach that focuses on surveillance, early detection, biosecurity, and prevention of disease transmission. 

Although many countries have significantly reduced the burden of bovine tuberculosis through coordinated control programs, the disease remains present in numerous regions where implementation of control measures is limited by economic, logistical, or social factors^1,2. 

Understanding the key components of disease prevention can help veterinarians support producers in reducing infection risk and protecting herd health. 

Why Control Matters 

The need for bovine tuberculosis control is driven by both animal and public health concerns. Infected cattle can experience reduced productivity, while humans remain at risk of acquiring infection through exposure to infected animals or contaminated animal products³. 

The disease also creates economic burdens through production losses, trade restrictions, surveillance costs, and the removal of infected animals from herds. Consequently, effective control strategies are essential not only for disease management but also for maintaining sustainable livestock production systems. 

Test-and-Cull Programs: The Foundation of Control 

Many developed countries have successfully reduced or eliminated bovine tuberculosis through routine testing and culling of infected animals under mandatory national programs. 

These programs rely on the identification and removal of infected cattle before they become significant sources of infection within the herd. Between 1953 and 1980, this approach contributed to successful disease control in many European countries and several nations in Central Europe⁴. 

In regions where control programs are established, cattle diagnosed with tuberculosis are generally not treated and affected animals are removed from the population¹. 

For veterinarians, this highlights the importance of surveillance and early case detection rather than attempting therapeutic management of infected cattle. 

The Role of Tuberculin Testing 

The tuberculin skin test remains the primary method for detecting bovine tuberculosis in cattle¹. 

Routine testing allows veterinarians to identify infected animals before obvious clinical signs develop. Early detection is particularly important because preclinical animals can serve as future sources of infection for both cattle and humans¹. 

The effectiveness of testing programs increases when positive animals are promptly removed and herd investigations are conducted to identify potential sources of infection. 

In many control systems, tuberculin testing forms the cornerstone of surveillance efforts and works best when integrated with other disease-monitoring measures. 

Slaughterhouse Surveillance and Food Safety 

Abattoirs play an important role in bovine tuberculosis control. 

Inspection of animals before and after slaughter provides opportunities to detect lesions that may have gone unnoticed during life. Improvements in meat inspection systems can help prevent contaminated products from entering the food chain and contribute to disease surveillance efforts⁵. 

The identification of an infected animal at slaughter can also provide valuable information regarding herd origin, allowing follow-up investigations and targeted disease control measures⁶. 

In addition, maintaining appropriate hygiene standards for foods of animal origin helps reduce risks associated with contaminated milk and meat⁷. 

Challenges in Disease Control 

Despite proven control strategies, implementation remains difficult in many parts of the world. 

Financial limitations, shortages of trained personnel, insufficient political support, and limited recognition of the disease's public health significance can all hinder control efforts. In some regions, testing and culling programs, movement restrictions, and slaughterhouse inspections may be considered economically challenging or socially unacceptable^2,3. 

Another challenge is the need to understand interactions among all potential hosts involved in disease maintenance. Successful long-term control requires addressing transmission across the broader host community rather than focusing solely on cattle populations². 

Practical Clinical Insight 

For practicing veterinarians, bovine tuberculosis control is most effective when viewed as a continuous herd health strategy rather than a response to individual cases. Regular surveillance, tuberculin testing, slaughterhouse monitoring, and prompt removal of infected animals remain the foundation of disease management. 

By combining early detection with sound biosecurity and food safety practices, veterinarians can play a central role in reducing disease transmission, protecting livestock productivity, and supporting broader public health goals. 

References 

1. Khairullah AR, Moses IB, Kusala MK, Tyasningsih W, Ayuti SR, Rantam FA, Fauziah I, Silaen OS, Puspitasari Y, Aryaloka S, Raharjo HM. Unveiling insights into bovine tuberculosis: A comprehensive review. Open Veterinary Journal. 2024 Jun 30;14(6):1330. https://pmc.ncbi.nlm.nih.gov/articles/PMC11268907/pdf/OpenVetJ-14-1330.pdf 

2. Gortázar C, De la Fuente J, Perelló A, Domínguez L. Will we ever eradicate animal tuberculosis?. Irish Veterinary Journal. 2023 Sep 22;76(Suppl 1):24. https://link.springer.com/content/pdf/10.1186/s13620-023-00254-9.pdf 

3. Ramanujam H, Palaniyandi K. Bovine tuberculosis in India: The need for One Health approach and the way forward. One Health. 2023 Jun 1;16:100495. https://www.sciencedirect.com/science/article/pii/S2352771423000150 

4. Jemal AM. Review on zoonotic importance of bovine tuberculosis and its control. Open Access Libr J. 2016;3(3):1-3. https://www.academia.edu/download/44796797/1102504-doc.pdf 

5. Clausi MT, Ciambrone L, Zanoni M, Costanzo N, Pacciarini M, Casalinuovo F. Evaluation of the presence and viability of Mycobacterium bovis in wild boar meat and meat-based preparations. Foods. 2021 Oct 12;10(10):2410. https://www.mdpi.com/2304-8158/10/10/2410 

6. Abbate JM, Arfuso F, Iaria C, Arestia G, Lanteri G. Prevalence of bovine tuberculosis in slaughtered cattle in Sicily, Southern Italy. Animals. 2020 Aug 21;10(9):1473. https://www.mdpi.com/2076-2615/10/9/1473 

7. Tora E, Getachew M, Seyoum W, Abayneh E. Public awareness, prevalence and potential determinants of bovine tuberculosis in selected districts of gamo zone, Southern Ethiopia. Veterinary Medicine: Research and Reports. 2022 Dec 31:163-72. https://www.tandfonline.com/doi/pdf/10.2147/VMRR.S370733