Longitudinal Genotype Replacement, Recombination and Neutralizing Epitope Variations in Porcine Epidemic Diarrhea Virus at a Commercial Pig Farm in Guangxi, China.
- 1College of Animal Science and Technology, Xinyang Agriculture and Forestry University, Xinyang 464000, China.
- 2Research Institute of Wens Foodstuff Group Co., Ltd., Yunfu 527400, China.
- 3South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China.
Abstract
Porcine epidemic diarrhea virus (PEDV) causes severe enteric disease in piglets. The spike (S) gene is the major target of neutralizing antibodies and a hotspot for genetic variation. In this study, eight PEDV S-gene sequences were obtained from a commercial pig farm in Guangxi, China, between 2021 and 2025. Phylogenetic analysis assigned all sequences to the G2 genotype, with G2c, G2d, and G2b subclusters detected at different time points. Recombination analysis identified sequence-level recombination signatures in the G2c sequences, with G2b-like and G2d-like sequences as parental relatives. Several amino acid substitutions were located within or adjacent to the COE and SS2 neutralizing epitopes, and N-glycosylation site variations were observed among subclusters. Structural predictions suggest that these combined changes may alter surface antigenic properties and confer immune evasion potential, though functional validation using neutralization assays is still required. These findings provide field-derived evidence for PEDV genetic evolution and recombination within a single swine herd, and support rational vaccine-strain evaluation and on-farm biosecurity strategies.
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BibTeX
@article{qin2026longitudinal,
title = {{Longitudinal Genotype Replacement, Recombination and Neutralizing Epitope Variations in Porcine Epidemic Diarrhea Virus at a Commercial Pig Farm in Guangxi, China.}},
author = {Feng Qin and Yang Luo and Jianzhu Li and Zhili Li and Jianguo Dong and Zhehui Qu and Guangke Xu and Tao Liu and Kaiwei Deng and Chihai Ji},
journal = {Animals : an open access journal from MDPI},
year = {2026},
month = oct,
doi = {10.3390/ani16203262},
url = {https://europepmc.org/article/MED/42939191},
note = {CC BY},
}
RIS
TY - JOUR
TI - Longitudinal Genotype Replacement, Recombination and Neutralizing Epitope Variations in Porcine Epidemic Diarrhea Virus at a Commercial Pig Farm in Guangxi, China.
AU - Feng Qin
AU - Yang Luo
AU - Jianzhu Li
AU - Zhili Li
AU - Jianguo Dong
AU - Zhehui Qu
AU - Guangke Xu
AU - Tao Liu
AU - Kaiwei Deng
AU - Chihai Ji
PY - 2026
DA - 2026/10/16
JO - Animals : an open access journal from MDPI
DO - 10.3390/ani16203262
UR - https://europepmc.org/article/MED/42939191
AB - Porcine epidemic diarrhea virus (PEDV) causes severe enteric disease in piglets. The spike (S) gene is the major target of neutralizing antibodies and a hotspot for genetic variation. In this study, eight PEDV S-gene sequences were obtained from a commercial pig farm in Guangxi, China, between 2021 and 2025. Phylogenetic analysis assigned all sequences to the G2 genotype, with G2c, G2d, and G2b subclusters detected at different time points. Recombination analysis identified sequence-level recombination signatures in the G2c sequences, with G2b-like and G2d-like sequences as parental relatives. Several amino acid substitutions were located within or adjacent to the COE and SS2 neutralizing epitopes, and N-glycosylation site variations were observed among subclusters. Structural predictions suggest that these combined changes may alter surface antigenic properties and confer immune evasion potential, though functional validation using neutralization assays is still required. These findings provide field-derived evidence for PEDV genetic evolution and recombination within a single swine herd, and support rational vaccine-strain evaluation and on-farm biosecurity strategies.
SN - 2076-2615
ER -