Porcine Epidemic Diarrhea Viruses (2022–2023) in Northern Vietnam: revealing a new subgenogroup (G2d) to emerge in pigs
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We present a molecular and phylogenetic evidence supporting the discovery of a subgenogroup of emerging Porcine epidemic diarrhea viruses (PEDVs) (2022–2023) in six provinces in Central and Northern Vietnam. This group is phylogenetically different from previously identified ones and it is proposed as a new subgenogroup G2d. The evolutionary distances between these and strains of typical subgenotypes (G1a, G1b, G1c, G2a, G2b, and G2c clades (G2cI, II, III, IV, and V)) were significant, substantially differentiating them from other subgenogroups. Our findings contribute to a better understanding of PEDV diversification, notably the recently isolated G2 strains that appeared in the 2010s as well as the complicated co-circulation of numerous (sub)genotype strains in Vietnam.
