European brown hare syndrome (EBHS) is a viral hepatitis that affects European brown hares (Lepus europaeus) and varying hares (Lepus timidus). The disease occurs today in free-living and farmed hares in most European countries (Gustafsson et al. 1989, Gavier-Widen & Morner 1991). In Sweden and Denmark the EBHS was first observed at the beginning of the eighties, however, in Finland and Norway the disease has not been reported yet.