On July 2, 2025, Mexican health authorities in Zacatecas confirmed 21 new cases of brucellosis, prompting a livestock cull and statewide health alert. The outbreak, linked to unpasteurized milk, has raised urgent concerns for public health and dairy industry practices.
A serious outbreak of brucellosis has been confirmed in Zacatecas, Mexico, with 21 new human cases traced to the consumption of unpasteurized milk. The regional health department has issued an urgent alert and initiated large-scale livestock culling as a containment measure.
Brucellosis is a zoonotic disease caused by the Brucella bacterium, commonly transmitted from infected animals—especially cattle, goats, and sheep—to humans. The disease presents symptoms such as fever, fatigue, muscle pain, and in chronic cases, damage to internal organs. Human transmission most often occurs via raw dairy products or direct animal contact.
Health authorities, alongside livestock regulators, are reinforcing epidemiological surveillance and urging both producers and the public to follow strict milk pasteurization protocols. Farms have been advised to boost hygiene standards, improve vaccination coverage, and enhance herd health management practices.
The outbreak is a significant concern for Mexico’s dairy sector, which plays a major role in both domestic food supply and rural employment. As livestock health becomes a growing global concern, this event highlights the risks of inadequate traceability, lack of pasteurization, and the need for certification systems in dairy supply chains.
While there is currently no commercial entity directly implicated, the incident has placed pressure on regional producers and government agencies to collaborate and contain the spread.
As Mexico addresses the crisis, the incident serves as a stark reminder of how animal-borne diseases can rapidly evolve into public health threats without effective controls in place.
