About the Authors

Maria Cristina Thaller

thaller@uniroma2.it

Affiliation Dipartimento di Biologia, University Tor Vergata, Roma, Italy

Luciana Migliore

Affiliation Dipartimento di Biologia, University Tor Vergata, Roma, Italy

Cruz Marquez

Affiliation Galápagos National Park Service, Puerto Ayora, Galápagos Islands, Ecuador

Washington Tapia

Affiliation Galápagos National Park Service, Puerto Ayora, Galápagos Islands, Ecuador

Virna Cedeño

Affiliations Galápagos Genetics, Epidemiology and Pathology Laboratory “F. Valverde”, Galápagos National Park, Puerto Ayora, Galápagos Islands, Ecuador, Concepto Azul, Guayaquil, Ecuador

Gian Maria Rossolini

Affiliation Dipartimento di Biologia molecolare, University of Sienna, Sienna, Italy

Gabriele Gentile

Affiliation Dipartimento di Biologia, University Tor Vergata, Roma, Italy

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MCT. Performed the experiments: MCT. Analyzed the data: MCT. Contributed reagents/materials/analysis tools: MCT. Wrote the paper: MCT GMR. Performed the microbiological screening and identification of the isolates: MCT LM. Analysed the resistant strains and carried out the molecular characterization of the acquired resistance traits: MCT GMR. Devised the sampling strategy: LM GG. Contributed critical discussion during data analysis: LM. Contributed discussion during preparation of the paper: LM GG. Revised the manuscript: LM CM WT VC GG. Performed the sampling: CM WT GG. Supervised the lab-work in the LEPG-G: VC. Organized the field trip: GG.