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Evaluation of the Thuringian Bovine Johne's Disease Control Program-A Case Study.
Karsten Donat1,2, Esra Einax1, Anne Klassen2
1Thüringer Tierseuchenkasse, Anstalt des öffentlichen Rechts, 07745 Jena, Germany.
Animals : an Open Access Journal From MDPI
|February 25, 2022
Summary
Implementing Johne's Disease (JD) control measures in Thuringia significantly reduced calf mortality. Herds certified as "non-suspect" for JD experienced lower calf death rates compared to affected or unenrolled herds.
Area of Science:
- Veterinary Epidemiology
- Animal Health Management
- Bovine Disease Control
Background:
- Johne's Disease (JD) poses a significant threat to dairy herds, impacting animal health and farm economics.
- The Thuringian Johne's Disease (JD) Control Program offers a structured approach to manage and eradicate JD.
- Understanding the impact of JD control on other herd health parameters, such as calf mortality, is crucial for program evaluation.
Purpose of the Study:
- To investigate the association between Johne's Disease (JD) herd status and annual calf mortality rates.
- To evaluate the effectiveness of JD control measures in reducing calf mortality in dairy herds.
- To compare calf mortality rates across different JD herd statuses: non-suspect, control stage, and unenrolled.
Main Methods:
- A longitudinal study design was employed over 10 consecutive years.
- Data from 93 dairy herds in Thuringia were analyzed, categorizing them into 'non-suspect' (n=13), 'control stage' (n=26), and 'not enrolled' (n=54).
- A generalized mixed linear model with repeated measures was used to assess the association between JD herd status and annual calf mortality rate.
Main Results:
- Herds certified as 'non-suspect' for Johne's Disease (JD) exhibited a significantly lower annual calf mortality rate.
- A comparison revealed that non-suspect herds had better outcomes regarding calf survival than herds in the control stage or those not enrolled in the program.
- The findings indicate a positive correlation between the implementation of JD control measures and improved calf survival.
Conclusions:
- Establishing and adhering to Johne's Disease (JD) control programs is associated with a reduction in calf mortality.
- The Thuringian JD Control Program demonstrates potential benefits beyond JD eradication, positively impacting overall herd health.
- Implementing robust JD control strategies is a valuable component of comprehensive dairy herd management.
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