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ORIGINAL RESEARCH article

Front. Vet. Sci.

Sec. Veterinary Infectious Diseases

Volume 12 - 2025 | doi: 10.3389/fvets.2025.1673809

Staphylococcus aureus characterization in commercial rabbit farms reveals high genetic diversity and widespread antimicrobial resistance

Provisionally accepted
Patricia  MascarósPatricia Mascarós1Carmen  Martínez-SeijasCarmen Martínez-Seijas1José  Francisco Díaz-MéndezJosé Francisco Díaz-Méndez1Juan María  Rosell PujolJuan María Rosell Pujol2Celia  SanzCelia Sanz3Alberto  Arnau-BonacheraAlberto Arnau-Bonachera1Laura  SelvaLaura Selva1Juan  M CorpaJuan M Corpa1*David  VianaDavid Viana1*
  • 1Departamento Producción y Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los Alimentos, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, C/Tirant lo Blanc 7, 46115. Alfara del Patriarca, Valencia, Spain
  • 2Cunivet Service, P.O. Box 518, 34080, Tarragona, Spain
  • 3Veterinary Diagnostic Disease and Autogenous Vaccine Laboratory, Exopol SL, Polígono Río Gallego, D/8. 50840, San Mateo de Gallego, Zaragoza, Spain

The final, formatted version of the article will be published soon.

Staphylococcus aureus is a relevant bacterium in animals and a major public health concern, recognized by the World Health Organization as a priority pathogen due to its critical role in antimicrobial resistance. In rabbits, it is a leading cause of mastitis, pododermatitis, and abscesses, and the primary cause of culling in reproductive does. However, its genetic diversity, transmission dynamics, and resistance patterns in this context remain poorly understood. This study aimed to characterize the genetic structure, geographical dissemination, and antimicrobial resistance profiles of S. aureus isolates from rabbit farms across the Iberian Peninsula. A sampling strategy based on the official farm census ensured representativeness. Sequencing and epidemiological data were used to assess clonal lineages and distribution, and antimicrobial resistance was also evaluated. The results revealed high clonal diversity, including 10 clonal complexes (CCs) and 35 sequence types, with 18 previously unreported in rabbits. However, this diversity is largely dominated by two lineages, CC121 and CC96, which together account for nearly 90% of all isolates. Geographical proximity and commerce influenced strain distribution, with defined patterns for certain lineages. Resistance was observed against all 14 tested antibiotics, including key classes for human medicine: cephalosporins, oxazolidinones, and glycylcyclines. Notably, 86.1% of isolates were classified as multidrug-resistant (MDR), and 9.1% were methicillin-resistant (MRSA). This study provides the most comprehensive and representative characterization to date of S. aureus diversity, dissemination patterns, and antimicrobial resistance in rabbit farming, underscoring the importance of continuous surveillance and reinforcing the need for improved control strategies and preventive measures within a One Health framework. To support the rabbit industry, we have developed "StaphyMAP", an open-access, interactive platform that provides anonymized, real-time data on the distribution, genetic diversity, and antimicrobial resistance patterns of Staphylococcus aureus isolates. This tool aims to assist veterinary clinicians in making informed empirical treatment decisions, thereby promoting more rational antimicrobial use and helping to curb the overuse of broad-spectrum antibiotics.

Keywords: livestock-associated Staphylococcus aureus, epidemiological surveillance, clonaldiversity, geographic dissemination, antimicrobial resistance, methicillin resistantStaphylococcus aureus, multidrug resistance

Received: 26 Jul 2025; Accepted: 10 Oct 2025.

Copyright: © 2025 Mascarós, Martínez-Seijas, Díaz-Méndez, Rosell Pujol, Sanz, Arnau-Bonachera, Selva, Corpa and Viana. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence:
Juan M Corpa, jmcorpa@uchceu.es
David Viana, dviana@uchceu.es

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