biostudies-literatureGao YMedical Research CouncilFonds De La Recherche Scientifique - FNRSUniversité de LiègeWelbiovead003https://www.ebi.ac.uk/biostudies/studies/S-EPMC9936792biostudies-literatureUnknown9(1)Cyprinid herpesvirus 3 (CyHV-3) is the archetype of fish alloherpesviruses and is advantageous to research because, unlike many herpesviruses, it can be studied in the laboratory by infection of the natural host (common and koi carp). Previous studies have reported a negative correlation among CyHV-3 strains between viral growth in vitro (in cell culture) and virulence in vivo (in fish). This suggests the existence of genovariants conferring enhanced fitness in vitro but reduced fitness in vivo and vice versa. Here, we identified the syncytial plaque formation in vitro as a common trait of CyHV-3 strains adapted to cell culture. A comparison of the sequences of virion transmembrane protein genes in CyHV-3 strains, and the use of various recombinantVirus evolutionVirus-induced interference as a means for accelerating fitness-based selection of cyprinid herpesvirus 3 single-nucleotide variants in vitro and in vivo.PMC9936792ARC15/19-12CDR J.0094.15 and PDR T.0241.19WELBIO-CR-2022 A-14 12MC_UU_12014/3Bernard NPirotte SZhang HVancsok CVanderplasschen AFCSridhar ASuarez NMDavison AJDesmecht SDonohoe OGao YHe BBoutier MfalseVirus-induced interference as a means for accelerating fitness-based selection of cyprinid herpesvirus 3 single-nucleotide variants in vitro and in vivo.Cyprinid herpesvirus 3 (CyHV-3) is the archetype of fish alloherpesviruses and is advantageous to research because, unlike many herpesviruses, it can be studied in the laboratory by infection of the natural host (common and koi carp). Previous studies have reported a negative correlation among CyHV-3 strains between viral growth in vitro (in cell culture) and virulence in vivo (in fish). This suggests the existence of genovariants conferring enhanced fitness in vitro but reduced fitness in vivo and vice versa. Here, we identified the syncytial plaque formation in vitro as a common trait of CyHV-3 strains adapted to cell culture. A comparison of the sequences of virion transmembrane protein genes in CyHV-3 strains, and the use of various recombinant2023-01-01T00:00:00Z20232026-05-13T14:32:26.443Z2024-11-09T23:51:59.213ZS-EPMC99367923681604910.1093/ve/vead003