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. 2014 Oct;20(10):1735-8.
doi: 10.3201/eid2010.140338.

Evidence of recombinant strains of porcine epidemic diarrhea virus, United States, 2013

Evidence of recombinant strains of porcine epidemic diarrhea virus, United States, 2013

Peng-Fei Tian et al. Emerg Infect Dis. 2014 Oct.

Abstract

To investigate the evolutionary process by which porcine epidemic diarrhea virus (PEDV) in the United States hypothetically descended from strains in China, we analyzed PEDV-positive samples collected in China during January 2012-July 2013. Recombination in 2 strain sublineages was likely associated with identification of PEDV in the United States in 2013.

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Figures

Figure
Figure
Phylogenetic analysis of newly determined and available porcine epidemic diarrhea virus strains based upon the S-ORF3-E-M-N (5′-spike protein–open reading frame 3–envelope–membrane–nucleoprotein-3′) nucleotide sequences. The tree was constructed by the neighbor-joining method. Bootstrap values are indicated for each node from 1,000 resamplings. The names of the strains, years and places of isolation, GenBank accession numbers, and genogroups proposed by Huang et al. (6) are shown. Black solid circles indicate the 21 PEDV strains in this genetic series. Scale bar represents nucleotide substitutions per site.

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