With Shamonda virus continuing to spread across Europe and two genetically distinct variants now identified, FVE will be hosting a webinar for veterinary practitioners on Tuesday 29 September (13:00-14:30 CEST), called Shamonda Virus in Cattle – What field vets need to know. Speakers include Helen Huber (RGS, Switzerland) and Kerstin Wernike (FLI, Germany) who will discuss the latest evidence and its practical implications. Topics will include emerging science and vector dynamics, practical sampling strategies and herd-level decision-making. Register for the webinar here.
Why this webinar matters
The virus, an orthobunyavirus of the Simbu serogroup, has spread from its initial detection in cattle in France, Switzerland and Germany to several other European countries. Recent sequencing has revealed a second, genetically distinct variant, indicating at least two independent introductions into Europe.
Two distinct variants circulating
SHAV-EU1, the variant first identified in southern Germany, France and Switzerland, has subsequently been detected in other species, including horses, alpaca and small ruminants. SHAV-EU2 has so far been detected in cattle in Germany and the Netherlands — including in a newborn calf — although its exact host range is not yet known. Clinical disease in cattle can include fever, diarrhoea, lethargy and marked drop in milk production. The consequences of foetal infection are still poorly understood.
Diagnostic and clinical challenges
The emergence of two variants has implications for surveillance and diagnosis. Low viral loads can make PCR confirmation difficult, while the two variants may require careful interpretation of results. With Culicoides midges considered the likely vector, continued clinical vigilance and appropriate sampling remain important.