The French agricultural sector is bracing for potential economic fallout as the highly contagious dermatosis nodularis bovis (DNB), commonly known as nodular disease, continues to spread among cattle populations. While not transmissible to humans, the viral disease poses a significant threat to livestock health, milk production, and international trade, particularly concerning the production of raw milk cheeses – a cornerstone of French gastronomy. The situation has prompted a renewed vaccination campaign and sparked debate among farmers regarding mandatory preventative measures.
First detected in France on June 29, 2025, in the Savoie department, the disease has rapidly expanded to several regions, including Ain, Haute-Savoie, Rhône, Jura, and Pyrénées-Orientales. As of October 21, 2025, authorities had confirmed 88 outbreaks across these areas, raising concerns about the potential for widespread disruption to the cattle industry. The economic implications are substantial, with the disease potentially leading to significant losses in livestock and reduced agricultural output. The impact extends beyond domestic markets, threatening France’s ability to export dairy products, especially those reliant on raw milk.
Understanding Dermatosis Nodularis Bovis
Dermatosis nodularis bovis is a viral disease caused by a poxvirus, characterized by the development of firm, raised nodules on the skin of infected cattle. These nodules can rupture, leading to open wounds that are susceptible to secondary bacterial infections. Beyond the skin lesions, the disease can cause fever, loss of appetite, reduced milk production, and, in severe cases, death. The virus is primarily spread by biting insects, such as flies and mosquitoes, but can similarly be transmitted through direct contact with infected animals or contaminated materials. The Savoie prefecture provides detailed information on the disease and preventative measures.
The concern surrounding raw milk cheeses stems from the potential for the virus to be present in the milk of infected animals. While pasteurization effectively eliminates the virus, raw milk cheeses, a protected and highly valued part of French culinary heritage, rely on unpasteurized milk. This creates a potential risk for the spread of the disease if infected animals enter the supply chain. The French government has been working to implement strict controls and monitoring programs to prevent contaminated milk from being used in cheese production.
Zoning and Vaccination Efforts
In response to the outbreak, French authorities implemented a series of zoning and control measures aimed at containing the spread of the disease. Initially, affected areas were designated as restricted zones, with strict regulations on the movement of cattle. Though, as the situation evolved, the zoning strategy was adjusted. As of October 22, 2025, all communes in Savoie and Haute-Savoie previously designated as “ZR1” zones were reclassified as vaccination zones. This shift reflects a change in strategy from strict containment to proactive prevention. France3 Regions reported on the lifting of the regulated zone in Savoie and Haute-Savoie.
A nationwide vaccination campaign has been launched to protect cattle populations. The campaign is being rolled out in phases, prioritizing areas with the highest risk of infection. The government is providing vaccines free of charge to farmers, but participation is not yet mandatory. This has led to some friction, with certain farmer groups advocating for compulsory vaccination to ensure herd immunity and prevent further outbreaks. The new vaccination campaign is being implemented in Savoie and Haute-Savoie, building on previous efforts to control the spread of the disease.
Farmer Opposition and Sanctions
Despite the government’s efforts, some farmers remain hesitant to vaccinate their livestock. Concerns range from the cost of administering the vaccine to skepticism about its effectiveness and potential side effects. A collective of farmers, known as LIBRe, has voiced strong opposition to mandatory vaccination, arguing that it infringes on their autonomy and imposes undue financial burdens. Le Dauphiné Libéré reported on the lifting of restrictions in 63 communes, but also highlighted ongoing farmer concerns.
The government has responded to non-compliance with sanctions, including fines and temporary suspensions of farming activities. One farmer in the Ariège department recently received a fine and a suspension after refusing to vaccinate her herd. La Gazette Ariégeoise detailed this case, illustrating the government’s commitment to enforcing vaccination protocols. These measures have sparked further controversy, with LIBRe denouncing them as “brutal” and calling for a more collaborative approach.
Impact on Raw Milk Cheese Production
The dermatosis nodularis bovis outbreak poses a direct threat to the production of raw milk cheeses, a significant part of the French dairy industry. Raw milk cheeses, such as Reblochon, Tomme de Savoie, and Saint-Marcellin, are renowned for their unique flavors and textures, which are attributed to the complex microbial ecosystems present in raw milk. These cheeses are also a major tourist attraction, drawing visitors to the regions where they are produced.
To mitigate the risk of contamination, authorities are implementing stringent testing and monitoring programs for raw milk. Farmers are required to regularly test their herds for the virus, and milk is screened before it can be used in cheese production. Any milk found to be contaminated is immediately discarded. These measures are adding to the costs of production and creating logistical challenges for cheesemakers.
The potential for export restrictions is also a major concern. If the outbreak continues to spread, other countries may impose import bans on French dairy products, further impacting the industry. The French government is working with international partners to ensure that any trade restrictions are based on scientific evidence and are proportionate to the risk.
Looking Ahead
The situation remains fluid, and the long-term impact of the dermatosis nodularis bovis outbreak is still uncertain. Authorities are closely monitoring the spread of the disease and adjusting their strategies as needed. The success of the vaccination campaign will be crucial in containing the outbreak and protecting the French cattle industry. Continued collaboration between the government, farmers, and the scientific community will be essential to address this challenge effectively.
As of November 4, 2025, restrictions on cattle gatherings and markets remain in place across France, further impacting the agricultural calendar. The next official update on the situation is scheduled for November 15, 2025, when the government will assess the effectiveness of the vaccination campaign and consider further measures. We encourage readers to share their thoughts and experiences in the comments below and to stay informed about this evolving situation.
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