Decision analysis model for paratuberculosis control in commercial dairy herds

Area of Science:

• Veterinary Economics
• Epidemiology
• Dairy Herd Management

Background:

• Paratuberculosis (Johne's disease) poses significant economic challenges in commercial dairy herds.
• Previous economic models for paratuberculosis control require updates with current epidemiological data.

Purpose of the Study:

• To develop and present an updated economic decision analysis model (JD-Tree) for paratuberculosis control in dairy herds.
• To evaluate the cost-effectiveness of different management strategies, diagnostic testing, and culling decisions.

Main Methods:

• The JD-Tree model was developed using Excel and PrecisionTree software.
• It incorporates herd management, diagnostic testing choices, test results, and subsequent management actions.
• Outcomes are measured by net cost-benefit value to the producer.

Main Results:

• Enhanced herd management and hygiene are frequently more cost-effective than diagnostic testing for paratuberculosis control.
• Low-cost diagnostic tests are often more beneficial than high-cost, high-sensitivity tests for many herds.
• Retaining early-stage infected cows with proper management can maintain farm income.

Conclusions:

• The JD-Tree model highlights that paratuberculosis control strategies should be tailored to individual herd economics and epidemiology.
• Veterinarians can use this model as an instructional tool to understand control economics and diagnostic test value.