High diversity of genetic lineages and virulence genes in nasal Staphylococcus aureus isolates from donkeys destined to food consumption in Tunisia with predominance of the ruminant associated CC133 lineage

  1. Gharsa, H. 2
  2. Ben Sallem, R. 2
  3. Ben Slama, K. 2
  4. Gómez-Sanz, E. 1
  5. Lozano, C. 1
  6. Jouini, A. 2
  7. Klibi, N. 2
  8. Zarazaga, M. 1
  9. Boudabous, A. 2
  10. Torres, C. 1
  1. 1 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  2. 2 Université de Tunis El Manar
    info

    Université de Tunis El Manar

    Túnez, Túnez

    ROR https://ror.org/029cgt552

Revista:
BMC Veterinary Research

ISSN: 1746-6148

Año de publicación: 2012

Volumen: 8

Páginas: 203

Tipo: Artículo

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DOI: 10.1186/1746-6148-8-203 SCOPUS: 2-s2.0-84867896038 WoS: WOS:000313118000001 GOOGLE SCHOLAR lock_openAcceso abierto editor

Otras publicaciones en: BMC Veterinary Research

Repositorio institucional: lock_openAcceso abierto Editor

Resumen

Background: The objective of this study was to determine the genetic lineages and the incidence of antibiotic resistance and virulence determinants of nasal Staphylococcus aureus isolates of healthy donkeys destined to food consumption in Tunisia.Results: Nasal swabs of 100 donkeys obtained in a large slaughterhouse in 2010 were inoculated in specific media for S. aureus and methicillin-resistant S. aureus (MRSA) recovery. S. aureus was obtained in 50% of the samples, being all of isolates methicillin-susceptible (MSSA). Genetic lineages, toxin gene profile, and antibiotic resistance mechanisms were determined in recovered isolates. Twenty-five different spa-types were detected among the 50 MSSA with 9 novel spa-types. S. aureus isolates were ascribed to agr type I (37 isolates), III (7), II (4), and IV (2). Sixteen different sequence-types (STs) were revealed by MLST, with seven new ones. STs belonging to clonal clomplex CC133 were majority. The gene tst was detected in 6 isolates and the gene etb in one isolate. Different combinations of enterotoxin, leukocidin and haemolysin genes were identified among S. aureus isolates. The egc-cluster-like and an incomplete egc-cluster-like were detected. Isolates resistant to penicillin, erythromycin, fusidic acid, streptomycin, ciprofloxacin, clindamycin, tetracycline, or chloramphenicol were found and the genes blaZ, erm(A), erm(C), tet(M), fusC were identified.Conclusions: The nares of donkeys frequently harbor MSSA. They could be reservoirs of the ruminant-associated CC133 lineage and of toxin genes encoding TSST-1 and other virulence traits with potential implications in public health. CC133 seems to have a broader host distribution than expected. © 2012 Gharsa et al.; licensee BioMed Central Ltd.