The European Centre for Disease Prevention and Control (ECDC) said it is monitoring the situation after French authorities reported the first known human infection.
ECDC said the patient died in early October and had been receiving treatment for a serious illness that made them more vulnerable to infection than the general population.
Investigations are still underway to determine whether the virus caused or contributed to the patient’s death and how the person became infected.
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No risk to general population reported
The leading hypothesis is that the patient was infected in eastern France, where the virus had circulated among animals during the spring and summer.
French authorities said that, based on the available information about the virus, no health risk to the general population had been identified so far.
ECDC said it is in contact with French authorities and European partners to assess the potential public health implications of the case.
Virus has spread among livestock in Europe
Shamonda virus was first identified in Nigeria in the mid-1960s. It was confirmed in Europe for the first time in late July after genomic tests detected the virus in sick cattle in southern Germany, Switzerland and eastern France.
France’s weekly animal health surveillance bulletin later reported detections in Austria, Belgium, Ireland, Italy, Liechtenstein, Luxembourg, the Netherlands, Portugal, Slovenia, Spain and Jersey.
There are currently no commercially available vaccines against Shamonda virus, according to WOAH.
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Impact on dairy farms
The virus has also affected milk production in infected cattle herds.
A study of nine French dairy farms found that milk output fell by as much as 75% in affected herds.
While the first known human case has prompted monitoring by European health authorities, officials have said there is currently no identified risk to the wider population.