Liu P. P., Lu H., Li S., Moureau Grégory, Deng Y. Q., Wang Y. Y., Zhang L. J., Jiang T., De Lamballerie Xavier, Qin C. F., Gould E. A., Su J. L., Gao G. F. (2012). Genomic and antigenic characterization of the newly emerging Chinese duck egg-drop syndrome flavivirus : genomic comparison with Tembusu and Sitiawan viruses. Journal of General Virology, 93 (Part 10), p. 2158-2170. ISSN 0022-1317.
Titre du document
Genomic and antigenic characterization of the newly emerging Chinese duck egg-drop syndrome flavivirus : genomic comparison with Tembusu and Sitiawan viruses
Année de publication
2012
Auteurs
Liu P. P., Lu H., Li S., Moureau Grégory, Deng Y. Q., Wang Y. Y., Zhang L. J., Jiang T., De Lamballerie Xavier, Qin C. F., Gould E. A., Su J. L., Gao G. F.
Source
Journal of General Virology, 2012,
93 (Part 10), p. 2158-2170 ISSN 0022-1317
Duck egg-drop syndrome virus (DEDSV) is a newly emerging pathogenic flavivirus causing avian diseases in China. The infection occurs in laying ducks characterized by a severe drop in egg production with a fatality rate of 5-15%. The virus was found to be most closely related to Tembusu virus (TMUV), an isolate from mosquitoes in South-east Asia Here, we have sequenced and characterized the full-length genomes of seven DEDSV strains, including the 5'- and 3'-non-coding regions (NCRs). We also report for the first time the ORF sequences of TMUV and Sitiawan virus (STWV), another closely related flavivirus isolated from diseased chickens. We analysed the phylogenetic and antigenic relationships of DEDSV in relation to the Asian viruses TMUV and STWV, and other representative flaviviruses. Our results confirm the close relationship between DEDSV and TMUV/STWV and we discuss their probable evolutionary origins. We have also characterized the cleavage sites, potential glycosylation sites and unique motifs/modules of these viruses. Additionally, conserved sequences in both 5'- and 3'-NCRs were identified and the predicted secondary structures of the terminal sequences were studied. Antigenic cross-reactivity comparisons of DEDSV with related pathogenic flaviviruses identified a surprisingly close relationship with dengue virus (DENV) and raised the question of whether or not DEDSV may have a potential infectious threat to man. Importantly, DEDSV can be efficiently recognized by a broadly cross-reactive flavivirus mAb, 2A10G6, derived against DENV. The significance of these studies is discussed in the context of the emergence, evolution, epidemiology, antigenicity and pathogenicity of the newly emergent DEDSV.
Plan de classement
Entomologie médicale / Parasitologie / Virologie [052]
;
Sciences du monde animal [080]
Localisation
Fonds IRD [F B010078777]
Identifiant IRD
fdi:010078777
