Detection, molecular characterization and phylogenetic analysis of G3P[12] and G14P[12] equine rotavirus strains co-circulating in central Kentucky.

Autor: Carossino M; Maxwell H. Gluck Equine Research Center, Department of Veterinary Science, University of Kentucky, Lexington, KY, USA; Escuela de Veterinaria, Universidad del Salvador, Champagnat 1599, Ruta Panamericana km54.5 (B1630AHU), Pilar, Buenos Aires, Argentina., Barrandeguy ME; Instituto de Virología, CICVyA, INTA. Las Cabañas y Los Reseros s/n, 1712, Castelar, Buenos Aires, Argentina; Escuela de Veterinaria, Universidad del Salvador, Champagnat 1599, Ruta Panamericana km54.5 (B1630AHU), Pilar, Buenos Aires, Argentina., Li Y; Maxwell H. Gluck Equine Research Center, Department of Veterinary Science, University of Kentucky, Lexington, KY, USA., Parreño V; Instituto de Virología, CICVyA, INTA. Las Cabañas y Los Reseros s/n, 1712, Castelar, Buenos Aires, Argentina., Janes J; University of Kentucky Veterinary Diagnostic Laboratory, Department of Veterinary Science, University of Kentucky, Lexington, KY, USA., Loynachan AT; University of Kentucky Veterinary Diagnostic Laboratory, Department of Veterinary Science, University of Kentucky, Lexington, KY, USA., Balasuriya UBR; Maxwell H. Gluck Equine Research Center, Department of Veterinary Science, University of Kentucky, Lexington, KY, USA. Electronic address: balasuriya1@lsu.edu.
Jazyk: angličtina
Zdroj: Virus research [Virus Res] 2018 Aug 15; Vol. 255, pp. 39-54. Date of Electronic Publication: 2018 Jun 01.
DOI: 10.1016/j.virusres.2018.05.025
Abstrakt: Equine rotavirus A (ERVA) is the leading cause of diarrhea in neonatal foals and a major health problem to the equine breeding industry worldwide. The G3P[12] and G14P[12] ERVA genotypes are the most prevalent in foals with diarrhea. Control and prevention strategies include vaccination of pregnant mares with an inactivated vaccine containing a prototype ERVA G3P[12] strain with limited and controversial field efficacy. Here, we performed the molecular characterization of ERVA strains circulating in central Kentucky using fecal samples collected during the 2017 foaling season. The data indicated for the first time that the G14P[12] genotype is predominant in this region in contrast to a previous serotyping study where only G3 genotype strains were reported. Overall, analysis of antigenic sites in the VP7 protein demonstrated the presence of several amino acid substitutions in the epitopes exposed on the surface including a non-conserved N-linked glycosylation site (D123N) in G14P[12] strains, while changes in antigenic sites of VP8* were minor. Also, we report the successful isolation of three ERVA G14P[12] strains which presented a high identity with other G14 strains from around the world. These may constitute ideal reference strains to comparatively study the molecular biology of G3 and G14 strains and perform vaccine efficacy studies following heterologous challenge in the future.
(Copyright © 2018 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: