Real-Time PCR–Based Detection of Mycoplasma Agalactiae in Sheep Bulk Tank Milk to Support Flock-Level Epidemiology

Why It Matters

Early, affordable detection of M. agalactiae enables targeted interventions, protecting milk quality and farm profitability. The approach sets a precedent for milk‑based disease monitoring in dense small‑ruminant sectors.

Key Takeaways

• Assay detects M. agalactiae in bulk milk.
• Over 900 Sardinian farms screened in 2026.
• Low-prevalence circulation found across flocks.
• Cost‑effective, non‑invasive surveillance tool.

Pulse Analysis

Contagious agalactia, caused by Mycoplasma agalactiae, remains a persistent threat to dairy sheep operations, leading to mastitis, reduced milk yields, and trade restrictions. Traditional diagnostics rely on invasive sampling and labor‑intensive culture methods, limiting large‑scale monitoring. As small‑ruminant farms proliferate in regions like Sardinia, a rapid, field‑ready diagnostic is essential for maintaining herd health and market confidence.

The newly validated real‑time PCR assay addresses these gaps by delivering high analytical specificity and sensitivity directly from bulk‑tank milk, a matrix that reflects herd‑level infection without individual animal handling. Validation data indicate detection limits capable of identifying low‑copy DNA, while the assay’s robustness tolerates the complex milk matrix. Deploying the test across 900+ farms demonstrated its practicality, generating prevalence maps that reveal a patchwork of low‑level infections, information previously unavailable through conventional surveillance.

Beyond immediate disease control, this milk‑based platform offers a template for broader epidemiological programs. Its scalability allows veterinary authorities to conduct cost‑efficient, region‑wide screenings, facilitating early outbreak alerts and informed biosecurity measures. For producers, the non‑invasive approach reduces labor costs and minimizes animal stress, translating into better welfare outcomes and potentially higher milk quality premiums. As the industry seeks sustainable monitoring solutions, the assay’s success in Sardinia could accelerate adoption in other high‑density small‑ruminant zones, shaping future standards for zoonotic and livestock disease surveillance.