ArticleJournal of animal science and biotechnology2026
Antibiotic exposure during weaning disrupts oral microbiota assembly in piglets.
Article in Journal of animal science and biotechnology, 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
backgroundThe use of antibiotics in swine production during the stressful weaning period is widespread. While their impact on the gut microbiome is documented, their effect on the developing oral microbiota, a critical gateway to systemic health, remains poorly understood. This study investigated how chronic exposure to tylosin (TYL) or a chlortetracycline-sulfadiazine-penicillin combination (CSP) shapes oral microbiota assembly in piglets from 21 to 60 days of age.
resultsHealthy piglets exhibited a defined ecological succession, transitioning from an early, Pseudomonadota-dominated types of oral microbiota, or referred to as orotypes (driven by Moraxellaceae) at weaning to a stable, mature Bacillota-dominated state (driven by Lachnospiraceae) by 40 days of age. Antibiotic exposure disrupted this developmental program. CSP treatment locked the microbiota in an immature, Pseudomonadota-dominated state, while TYL promoted a dispersed and unstable Bacillota community. Dysbiosis was marked by enrichment of pathobionts (e.g., Moraxella, Bergeyella) and depletion of beneficial commensals like Veillonella and Phocaeicola, with the latter reduced in both the oral and gut microbiota. These structural shifts were linked to dysregulated microbial energy and lipid metabolism. Crucially, antibiotics compromised mucosal immunity, reducing salivary secretory IgA (SIgA), and provoked inflammation, evidenced by elevated salivary extracellular ATP (eATP), histological damage and transcriptome alteration in oral tissue, and changed serum metabolites.
conclusionsOur findings demonstrate that early-life antibiotic exposure disrupts the developmental programming of the oral ecosystem. The oral microbiota serves as a sensitive indicator of antibiotic impact and a key mediator of systemic health, highlighting the need for strategies that safeguard microbial succession to promote sustainable swine health.
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