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Updated phylogenetic analysis of the spike gene and identification of a novel recombinant porcine epidemic diarrhoea virus strain in Taiwan
Author(s) -
Hsueh FuChun,
Lin ChaoNan,
Chiou HueYing,
Chia MinYuan,
Chiou MingTang,
Haga Takashi,
Kao ChiFei,
Chang YenChen,
Chang ChiaYu,
Jeng ChianRen,
Chang HuiWen
Publication year - 2020
Publication title -
transboundary and emerging diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.392
H-Index - 63
eISSN - 1865-1682
pISSN - 1865-1674
DOI - 10.1111/tbed.13365
Subject(s) - porcine epidemic diarrhea virus , biology , virology , outbreak , nonsynonymous substitution , gene , phylogenetic tree , virus , recombinant dna , genetic diversity , strain (injury) , genetic variation , genetics , genome , medicine , population , environmental health , anatomy
New variants of porcine epidemic diarrhoea virus (PEDV) causing a highly contagious intestinal disease, porcine epidemic diarrhoea virus (PED), have resulted in high mortality in suckling pigs across several countries since 2013. After 2015, the prevalence of the genogroup 2b (G2b) PEDVs decreased in a cyclical pattern with endemic seasonal outbreaks occasionally seen. To better understand the genetic diversity of PEDVs recently circulating in Taiwan, full‐length spike (S) genes of 31 PEDV strains from 28 pig farms collected during 2016–2018 were sequenced. While the majority of S gene sequences (from 27/28 farms) were closely related to the previous G2b PEDV strains, increased genetic diversities leading to several nonsynonymous mutations scattering in the neutralizing epitopes of the S gene were detected in PEDVs recently circulating in Taiwan. Furthermore, novel recombinant variants, the PEDV TW/Yunlin550/2018 strains exhibiting recombinant events between a previously isolated Taiwan PEDV G2b strain and a wild‐type PEDV G1a strain, were identified and further classified into a new genogroup, G1c. These results provide updated information about the genetic diversity of currently circulating PEDVs in the field and could help to develop more suitable strategies for controlling this disease.