Vigilance required — Botulism outbreaks in Italy serve as warning to producers

Double outbreak with fatal consequences

In August 2025, Italy was shaken by two serious outbreaks of botulism. In Diamante, in the Calabria region, sandwiches containing vegetables preserved in oil were sold that were found to be contaminated with Clostridium botulinum. Two people died, including Luigi Di Sarno and Tamara D'Acunto, and more than a dozen others were hospitalised, some in critical condition. Shortly before that, Sardinia was the scene of a similar incident in which an epidemiological link was established between the consumption of guacamole at a festival and multiple hospitalisations, including at least one death. The Italian authorities took decisive action, with recalls of the products involved, closures of vendors and large-scale inspections. Antitoxins were even delivered by air force to treat patients at an early stage.

Not just a problem with homemade preserves

These incidents make it clear that commercial food products are not immune to contamination either. While botulism is traditionally associated mainly with home-made preserves, these cases show that mistakes can also occur in professional production environments with fatal consequences. Vegetables in oil pose a particular risk in this regard. Research by the Italian Istituto Superiore di Sanità shows that almost half of all reported cases of botulism in the country are caused by this type of product. When these vegetables are packaged in a low-oxygen environment, at a low acidity level and without sufficient heating, the bacteria can develop unnoticed.

Vulnerabilities in the chain

During its inspections, the Italian food inspection agency, NAS, found irregularities at almost half of the food trucks and festival vendors it visited. This illustrates that not only production, but also the distribution and sales phases are vulnerable links in the chain. The cultural context also plays a role here. Italy has a strong tradition of home preservation, especially in the south. Although this is not necessarily a problem in itself, it does entail additional risks, as knowledge and application of hygienic preservation techniques are not always guaranteed. In the Netherlands and Belgium, too, checks and inspections indicate that similar vulnerabilities exist, especially among small producers, food trucks and market vendors who do not always pay strict attention to sterilisation, pH and salt content. Professional producers would do well to learn from this tradition and practical examples, but also to distinguish themselves emphatically through demonstrable food safety.

Stricter processes and checks

For producers, this means that strict sterilisation procedures are essential. Vegetables in oil must be processed under controlled conditions, preferably in industrial autoclaves that heat the contents to at least 121 degrees Celsius. Careful measurement of acidity and salt content is indispensable in this regard. A pH that is too high or a salt concentration that is too low can make the difference between a safe product and a potentially lethal hazard. Visual inspection is also crucial: swollen lids or packaging that shows signs of gas formation must be immediately withdrawn from the market.

Chain responsibility and rapid response

Chain transparency is an important factor in prevention. Producers must know their suppliers well and carry out random tests on incoming batches, especially for high-risk products. As soon as there are indications of possible contamination, a recall procedure must be initiated without hesitation in cooperation with the competent authorities. Equally important is having protocols in place for rapid response in the event of an incident. Recognising early symptoms in consumers, such as blurred vision, swallowing problems or breathing difficulties, and seeking immediate medical attention can save lives.

Communication as a weapon against contamination

Finally, communication plays a key role. Producers who are open about their preventive measures and inform consumers about both the risks and the signs of contamination strengthen confidence in their brand and contribute to broader awareness of food safety.

Conclusion: combining tradition with safety

The recent cases of botulism in Italy remind us that food safety is not just a matter of complying with regulations. It is a continuous process of vigilance, prevention and responsibility. In a market where consumers increasingly value authenticity and craftsmanship, the challenge for producers lies in combining traditional flavours with modern safety standards. Only in this way can the risk of an invisible but life-threatening enemy such as Clostridium botulinum be reduced to an absolute minimum.