Molecular and antigenic characterization of bovine Coronavirus circulating in Argentinean cattle during 1994-2010

文献类型: 外文期刊

第一作者: Bok, M.

作者: Bok, M.;Mino, S.;Rodriguez, D.;Badaracco, A.;Vega, C.;Parreno, V.;Mino, S.;Nunes, I.;Souza, S. P.;Bilbao, G.;Odeon, A.;Louge Uriarte, E.;Galarza, R.;Saif, L. J.

作者机构:

关键词: Coronavirus;Neonatal calf diarrhea;Cross-protection

期刊名称:VETERINARY MICROBIOLOGY ( 影响因子:3.293; 五年影响因子:3.599 )

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收录情况: SCI

摘要: Bovine coronavirus (BCoV) is an important viral pathogen associated with neonatal calf diarrhea. Our aim was to investigate the incidence of BCoV in diarrhea outbreaks in beef and dairy herds from Argentina during 1994-2010. A total of 5.365 fecal samples from diarrheic calves were screened for BCoV diagnosis by ELISA. The virus was detected in 1.71% (92/5365) of the samples corresponding to 5.95% (63/1058) of the diarrhea cases in 239 beef and 324 dairy farms. The detection rate of BCoV was significantly higher in dairy than in beef herds: 12.13% (29/239) vs. 4.32% (14/324) respectively. Phylogenetic analysis of the hypervariable S1 region of seven representative samples (from different husbandry systems, farm locations and years of sampling) indicated that BCoV strains circulating in Argentinean beef and dairy herds formed a cluster distinct from other geographical regions. Interestingly, Argentinean strains are distantly related (at both the nucleotide and amino acid levels) with the Mebus historic reference BCoV strain included in the vaccines currently available in Argentina. However, Mebus-induced antibodies were capable of neutralizing the BCoV Arg95, a field strain adapted to grow in vitro, and vice versa, indicating that both strains belong to the same CoV serotype reported in cattle. This work represents the first large survey describing BCoV circulation in Argentinean cattle. (C) 2015 Elsevier B.V. All rights reserved.

分类号: S8

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