France Confirms First Human Death Linked to Shamonda Virus

France has confirmed the first known human infection with Shamonda virus, along with the patient's death. The virus affects cattle, sheep and goats and had been considered non-transmissible to humans. The case occurred in Lyon, and the patient died earlier this month. According to the French government, based on current knowledge of the pathogen there is no risk to the general public, though health authorities are continuing their investigation.

What is known about the patient

The man was severely immunosuppressed, so the case is regarded as exceptional. The official statement says the neurological complications seen before his death were most likely related to Shamonda infection. Preliminary evidence suggests he contracted the virus from an insect bite. Among animals, the main route of transmission is a tiny gnat known as the biting midge.

The virus in animals

The virus was first identified in Nigeria in the mid-1960s. Since then, sporadic infections have been reported in livestock across Africa and in Japan. Cattle are considered the primary host because they develop visible symptoms; sheep and goats can be infected, but no obvious clinical signs have been documented. The incubation period after a midge bite is two to three days. Symptoms include fever, diarrhea and reduced milk production, and in pregnant cows the virus can cause miscarriages or severe deformities in calves. No vaccine exists, so prevention relies on insecticides and repellents.

Situation in Europe

Several European countries are on alert because the region was considered free of the virus until a few months ago. This summer a new variant, Shamonda-Europe, was detected in livestock in Switzerland, and cases were later found in Germany, France, Austria, Belgium, the Netherlands, Liechtenstein, Italy and Spain. Spain's Ministry of Agriculture, Fisheries and Food says two genetically distinct forms, Type 1 and Type 2, circulate in Europe. In early September, both types were confirmed on farms in 37 French provinces.

Expert views

Ben Brennan, professor of virology at the University of Glasgow, called the finding important but urged perspective: the patient had a serious underlying illness, and it is not yet known whether the virus contributed to the death. David Roiz of Spain's Institute for Game and Wildlife Research said it is premature to draw conclusions and that the situation should be monitored with vigilance.