ArticleVeterinary world2025
First genomic evidence and molecular epidemiology of porcine bufavirus in Myanmar: Whole-genome characterization, phylogenetic insights, and potential zoonotic implications.
Article in Veterinary world, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background and Aim: Porcine bufavirus (PBuV) is an emerging enteric parvovirus increasingly reported in swine populations worldwide, but its epidemiological and genomic characteristics remain poorly understood in Southeast Asia. This study aimed to conduct a cross-sectional survey to determine the occurrence of PBuV in pig farms in Myanmar and to genetically characterize circulating Myanmar-PBuVs using whole-genome sequencing (WGS). Materials and Methods: Between January and September 2023, 445 rectal swab samples were collected from pigs of various age groups and clinical statuses across 19 pig farms in the Yangon and Nay Pyi Taw Regions. Samples were screened using nested polymerase chain reaction (PCR) targeting the nonstructural protein 1 ( Results: PBuV positivity was 15.06% (67/445; 95% confidence interval: 11.9-18.7), with detection in both diarrheic and healthy pigs. Fattening pigs exhibited the highest positivity (36.55%), and PBuV occurrence was significantly associated with winter months (p < 0.05). Seven Myanmar-PBuVs were successfully sequenced and clustered within the PBuV clade, showing close genetic relatedness to Austrian and Chinese PBuVs. Myanmar-PBuVs shared 91.81%-100% whole-genome nucleotide identity, with substantially lower identity (48%-63%) to BuVs from humans, dogs ( Conclusion: This study provides the first genomic evidence of PBuV circulation in Myanmar and expands the global PBuV sequence database. The high detection in fattening pigs, seasonal trends, and phylogenetic proximity to European and Chinese strains highlight possible transboundary introduction pathways. Genetic similarities between Myanmar-PBuVs and human BuV in
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