France records first human death from livestock virus Shamonda

First human case confirmed On 22 October, French health authorities announced that a patient in Lyon had died after testing positive for the Shamonda virus, a disease that has until now only been known to affect livestock. The case is the first documented infection in a human and the only one that has resulted in death.

Patient profile and clinical course The individual was hospitalised for a serious illness and had a severely weakened immune system. Neurological symptoms appeared during treatment, and subsequent laboratory work identified the virus. Investigations suggest the infection was acquired through a bite from a culicoid midge in eastern France.

About the Shamonda virus Shamonda belongs to the Orthobunyavirus group and is primarily transmitted by biting midges. In animals it causes fever, diarrhoea and reduced milk production in cattle, and can lead to abortions, fetal malformations and neurological disease in horses. The virus was first detected in Nigeria in 1965 and has since been reported in Africa, Asia and Japan.

European spread The virus entered Europe in late July 2026, with initial cases reported on cattle farms in France. By 20 October it had been detected in more than a dozen western European countries, including Germany, Spain and Ireland. In France the virus is believed to have circulated among livestock since spring.

Public health assessment French ministries of Health and Agriculture stated that the case was exceptional and that there is no identified risk to the general public. The World Health Organization and the European Centre for Disease Prevention and Control are monitoring the situation but have confirmed that the infection is isolated and unlikely to spread.

Impact on livestock The World Organisation for Animal Health notes that the long‑term effects of the European variants on animal health remain uncertain and that reporting is incomplete. Infected cattle can suffer from reduced milk output, while sheep, goats, horses and alpacas may also show signs of illness.

Ongoing investigations Clinical, biological and epidemiological studies are still underway to determine the exact route of transmission and to rule out other potential sources. Authorities continue to analyse samples from the patient and from animals in the surrounding area.

Summary The first human death linked to the Shamonda virus highlights the need for vigilance in monitoring zoonotic diseases. While the incident is isolated, it underscores the importance of surveillance in both animal and human populations as the virus spreads across Europe.