| publication name | Genetic detection and characterization of HE and S genes of recent betacoronaviruses in rabbits from Egypt |
|---|---|
| Authors | .M. El-Nahas; H.S. El-Sayed; G.F. El-Bagoury; S.S.A. Sharawi; A.S. El-Habbaa; S.S. El-Basuni |
| year | 2017 |
| keywords | Egyptian RCoV; New Zealand rabbits; RT– PCR; HE and S gene analysis |
| journal | Revue de Médecine Vétérinaire |
| volume | 168 |
| issue | 7-9 |
| pages | 164-172 |
| publisher | Revue de Médecine Vétérinaire |
| Local/International | International |
| Paper Link | https://www.revmedvet.com/affiche1_us.php?id=2017&vol=7 |
| Full paper | download |
| Supplementary materials | Not Available |
Abstract
The current study is the first reported molecular characterization of rabbit coronavirus strains in Egypt. The cecal contents taken from young New Zealand rabbits (5-6 weeks old) with enteritis were tested for the presence of coronaviruses using RT–PCR with primers specific for the polymerase gene. The three positive samples showed the presence of the hemagglutinin-esterase (HE) gene indicative of Betacoronavirus subgroup A. Betacoronavirus strains designated as rabbit coronavirus (RCoV) Egypt/Qal/1, RCoV Egypt/ Qal/2 and RCoV Egypt/Qal/3 were partially sequenced for their HE and spike (S) genes. In all RCoV Egypt/Qal strains, the nucleotide homology was 98.3-100% and 99.8-100% for HE and S genes respectively while the deduced amino acid homology was 98.7-100% and 99.5-100% for HE and S proteins respectively with characteristic cleavage site QGRSRR motif in their S proteins. High similarity was observed with RCoV HKU14 strains and bovine coronavirus strains (BCoV) than other Betacoronaviruses. Phylogenetic data of nucleotide and amino acid sequences of the HE and S genes revealed that all RCoV Egypt/Qal strains were more homologous to each other and were distinct from the other known Betacoronavirus published on GenBank. The findings suggest the existence of a novel variant of RCoV genetically related to RCoV HKU14 strains