Norovirus Outbreak Linked to Kayama Restaurant in Bologna, Italy

A recent outbreak of gastroenteritis affecting dozens of customers at the Kayama restaurant in Zola Predosa, Bologna, Italy, has been attributed to norovirus, according to the local health authority (AUSL). The restaurant has been temporarily closed as investigations continue.

Initial Reports and Restaurant Response

Initial reports suggested a possible food poisoning incident following meals consumed at the restaurant over the past weekend. However, Osaka Snc, the company that owns Kayama, has refuted these claims, stating that the illness is due to a norovirus epidemic. The AUSL has confirmed this assessment through laboratory analysis of patients involved in the outbreak .

Norovirus: A Highly Contagious Virus

Norovirus is a highly contagious virus that causes vomiting and diarrhea. It is a common cause of gastroenteritis, often referred to as the “stomach flu,” though it is not related to influenza.

Transmission of norovirus can occur through several routes:

• Person-to-person contact: Direct physical contact with an infected individual.
• Fecal-oral route: Ingestion of contaminated food or water.
• Aerosol transmission: Inhalation of virus particles released during vomiting.
• Contaminated surfaces: Touching surfaces contaminated with the virus.

According to the Istituto Superiore di Sanità, the majority of documented cases are linked to the consumption of contaminated water or food.

Investigation and Hygiene Measures

The AUSL is conducting an epidemiological investigation, including testing of restaurant staff. Some staff members have tested positive for norovirus, further supporting the viral origin of the outbreak. The restaurant maintains that no interventions were made by the Carabinieri or the Nas (Italian food safety police), with only the AUSL involved in the investigation.

Effective control of norovirus relies heavily on rigorous hygiene practices in food and drink handling and distribution.

Current Status

As of March 8, 2026, the Kayama restaurant remains closed while the AUSL completes its analysis to determine the precise origin of the gastroenteritis outbreak. The AUSL has not yet released the definitive results of these analyses.