French health authorities have confirmed the world's first known human infection with the Shamonda virus, a pathogen primarily associated with livestock. The patient, who contracted the virus in eastern France, died earlier this month, prompting monitoring by European health organizations.
Investigations Underway in France
The patient, who passed away in early October, was reportedly receiving treatment for a serious underlying illness that made them more vulnerable to infection. Investigations are currently underway to determine whether the Shamonda virus directly caused or contributed to the patient's death, as well as to pinpoint the exact route of infection. The leading hypothesis suggests the individual was infected in eastern France, an area where the virus had been circulating among animals during the spring and summer.
Shamonda Virus: A Livestock Pathogen
The Shamonda virus was first identified in Nigeria in the mid-1960s. It is primarily found in cattle and is transmitted through the bites of infected midges. The World Organisation for Animal Health (WOAH) notes that the virus has also been detected in other livestock, including horses, alpacas, sheep, and goats.
Spread Among European Livestock
The virus made its first confirmed appearance in Europe in late July, when genomic tests identified it in sick cattle across southern Germany, Switzerland, and eastern France. Subsequently, detections were reported in Austria, Belgium, Ireland, Italy, Liechtenstein, Luxembourg, the Netherlands, Portugal, Slovenia, Spain, and Jersey.
Impact on Dairy Farms
The virus has also shown a significant impact on milk production in infected cattle herds. A study conducted on nine French dairy farms revealed that milk output in affected herds could fall by as much as 75%. Currently, there are no commercially available vaccines against the Shamonda virus.
No Identified Risk to General Population
Despite the tragic human case, French authorities and the European Centre for Disease Prevention and Control (ECDC) emphasize that, based on current information, no health risk to the general population has been identified. The ECDC is in contact with French authorities and other European partners to assess any potential public health implications of this isolated case.