ArticleVirology journal2026
Virome of post-weaned diarrhoeic pigs and healthy cohorts in England.
Article in Virology journal, 2026. 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
backgroundPost-weaning diarrhoea (PWD) is a disease syndrome that negatively impacts pig health, welfare and productivity. PWD typically occurs within two weeks of weaning and coincides with significant physiological changes, including villus atrophy and increased crypt depth in the gastrointestinal (GI) tract. The GI microbiome of healthy pigs is a complex ecosystem of commensal microorganisms. Disruption of the natural integrity of the GI tract has been associated with increased colonization by both viral and bacterial pathogens.
methodsIn this study, metagenomic sequencing was used to assess the presence, load, and diversity of viruses in the GI tracts of PWD-affected pigs and age-matched healthy (AMH) cohorts on commercial pig farms in England. In addition, the viromes of archived faecal samples from post-weaned pigs between four and six weeks of age, collected from diagnosis-not-reached (DNR) and diagnosis-reached (DR) enteric cases were investigated through sequencing.
resultsViruses belonging to at least ten virus families were identified in both PWD and AMH pigs including astrovirus, enterovirus, kobuvirus, smacovirus, picobirnavirus, sapovirus, parvovirus, posavirus, teschovirus, sapelovirus, rotavirus, torovirus, anellovirus and adenovirus. Co-infection with four viruses, astrovirus, enterovirus, kobuvirus and smacovirus was detected in all samples from PWD and AMH pigs. No sequence reads matching porcine coronaviruses, porcine reproductive and respiratory disease virus, porcine circoviruses, swine influenza virus, atypical porcine pestivirus or porcine teschovirus-1 were detected in either PWD or AMH faecal samples. Metagenomic analysis also identified several viruses with a higher virus load in PWD cases (astro, entero, sapelo, sapo, posa, adeno and toro-viruses), but the differences from those in AMH cases were not statistically significant. No viruses were detected in samples from archived DNR and DR cases that were not found in the PWD and AMH pigs.
conclusionsThis study revealed the complexity of the virus element in the enteric microbiome in the post-weaned pigs. The role of the viruses detected and their interplay with the host and other bacterial or viral flora in inducing PWD, however, remains unclear and warrants further studies.
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