France Confirms First Human Case of Shamonda Virus

France reported the first known human infection with Shamonda virus, a pathogen usually confined to livestock, after a patient who contracted it died in early October, according to a government statement cited by Reuters via the New York Post. The man, in his 60s and living in the Lyon area, was already being treated for a serious underlying illness that made him more susceptible to infection than the general population, the Stockholm-based European Centre for Disease Prevention and Control said.

How does Shamonda virus spread to animals and people?

Shamonda is transmitted by biting midges and is most commonly detected in cattle, though it has also turned up in horses, alpaca, sheep and goats, according to the World Organization for Animal Health (WOAH). French authorities said they suspect the Lyon-area patient was bitten by a midge carrying the virus in eastern France, where it had already been circulating among animals through the spring and summer.

Where else has Shamonda virus been found this year?

The virus was first identified in Nigeria in the mid-1960s and was not confirmed in Europe until late July 2026, when genomic testing on sick cattle turned up positive results in southern Germany, Switzerland and eastern France, the report said. France's weekly animal health surveillance had been tracking the virus in livestock in the region before the human case emerged.

Did officials say the virus could spread more widely among people?

The World Health Organization, which said it was in contact with French authorities about the outbreak, characterized the case as contained. "Based on current information and knowledge of the transmission of closely related viruses, this is an isolated human case and it is unlikely to lead to wider spread at this time," the Geneva-based agency said in a statement. The French government separately said no health risk to the general population had been identified.

Is Shamonda virus regulated under EU animal health law?

Shamonda is not classified as a disease under the EU Animal Health Law and is not subject to official surveillance or control measures at the regulatory level, according to WOAH. That classification means member states are not required to report cases or impose containment measures the way they would for a listed animal disease, even as French veterinary authorities continued their own weekly monitoring of livestock in the affected region.

What symptoms does Shamonda virus cause in livestock?

Affected cattle typically show diarrhea, weakness and loss of appetite, with fever appearing less often, according to the surveillance data referenced in the French report.

Shamonda virus by the numbers

• First identified: Nigeria, mid-1960s
• First confirmed in Europe: late July 2026, in cattle across Germany, Switzerland and France
• Known human cases to date: 1
• Patient age: 60s

No additional human cases have been reported as of Thursday, and both French health authorities and the WHO said current data point to an isolated infection tied to the patient's underlying vulnerability rather than a pattern of human-to-human or widespread midge-to-human transmission.