SRLV in vitro infection upon supernatant transfer. A RT activity (Abs405nm) of culture supernatants from red deer skin fibroblasts (DSF), fallow deer skin fibroblasts (FSF) and ovine fibroblasts (OSF) infected with SRLV strains Ev1 or 496. B Viral quantification of viral RNA (copies/µL) in the supernatants from DSF, FSF and goat synovial membrane cells (GSM) infected with strains A4 or CAEV-Co. C, D Culture supernatants from DSF, FSF and OSF infected with Ev1 or 496 respectively (P0) were transferred to fresh OSF twice (P1.OSF and P2.OSF) and RT values represented (Abs405nm). E SRLV RNA copies in the supernatant of DSF, FSF and GSM infected with CAEV-Co (P0) and after transfer of supernatants to fresh GSM twice (P1.GSM and P2.GSM). Squares represent values from infected cells and circles indicate non-infected cells.