Dengue in Marseille: First Indigenous Case Detected in the Region in 2026

Wednesday 26 - 11:10

The first indigenous case of dengue has been confirmed in Marseille, triggering the implementation of health measures aimed at preventing a potential spread of the virus. The announcement was made on Tuesday evening by the Regional Health Agency of Provence-Alpes-Côte d’Azur.

The individual in question resides in the 12th arrondissement of Marseille. According to initial information provided by health authorities, the infection was likely caused by the bite of a tiger mosquito carrying the virus.

An Infection on French Territory

The term “indigenous” indicates that the infected person did not contract the disease during travel to an area where dengue is actively circulating. Authorities specify that they had not traveled to an affected area in the 15 days prior to the onset of symptoms.

Dengue is primarily transmitted through bites from infected mosquitoes, particularly the tiger mosquito. The detection of this first case in the region in 2026 has prompted relevant services to quickly initiate a surveillance and prevention system around areas frequented by the affected individual.

Mosquito Control Operations Underway

Interventions have notably been entrusted to the Interdepartmental Agreement for Mosquito Control along the Mediterranean coast. These operations concern public spaces as well as certain private gardens located near areas identified as potentially exposed.

The objective is to quickly reduce the presence of mosquitoes capable of transmitting the virus and to eliminate areas favorable to their reproduction.

At the same time, the Regional Health Agency, Public Health France, and the City of Marseille must conduct field investigations. Door-to-door operations are planned in the affected areas to identify any additional cases and to raise awareness among residents about prevention measures.

Enhanced Surveillance Against the Tiger Mosquito

The discovery of this first indigenous case of the year in the region serves as a reminder of the progression of the tiger mosquito across French territory and the health issues associated with its presence.

Authorities are now relying on a rapid response around the detected case to limit the risk of local virus circulation. Monitoring residents in the affected areas and mosquito control operations are the primary tools being mobilized in the immediate term.