Leptospirosis Surge in La Réunion: Rat Eradication Efforts Underway

Public health officials on the French Indian Ocean island of La Réunion reported 142 cases of leptospirosis since the beginning of 2026, according to the latest epidemiological update from Santé publique France.

The bacterial disease, which spreads through contact with water or soil contaminated by animal urine, has prompted an immediate response in the Sainte-Anne commune. On Friday, April 17, 2026, the CIREST intercommunal authority launched a targeted rat eradication operation at Bassin Bleu, a known environmental hotspot for rodent activity.

Thirty traps were deployed during the initiative, which health authorities described as necessary due to the area’s exceptionally favorable conditions for rat proliferation. The operation follows a recent cluster of leptospirosis cases linked to the site.

Leptospirosis, often referred to as “rat fever,” can cause a wide range of symptoms in humans, from mild flu-like illness to severe complications affecting the kidneys, and liver. While treatable with antibiotics, early detection is critical to prevent hospitalization or long-term health impacts.

Health officials continue to monitor the situation closely and urge residents to avoid contact with potentially contaminated freshwater sources, particularly after heavy rainfall, which can increase the risk of exposure.