Marked Presence of Methicillin-Resistant Staphylococcus aureus in Wild Lagomorphs in Valencia, Spain
Moreno-Grúa, Elena (Universidad CEU Cardenal Herrera. Instituto de Investigación Biomedico)
Pérez-Fuentes, Sara (Universidad CEU Cardenal Herrera. Instituto de Investigación Biomedico)
Viana, David (Universidad CEU Cardenal Herrera. Instituto de Investigación Biomedico)
Cardells-Peris, Jesús (Universitat Autònoma de Barcelona)
Lizana, Victor (Universitat Autònoma de Barcelona)
Aguiló-Gisbert, Jordi (Universitat Autònoma de Barcelona)
Selva, Laura (Universidad CEU Cardenal Herrera. Instituto de Investigación Biomedico)
Corpa Arenas, Juan Manuel (Universidad CEU Cardenal Herrera. Instituto de Investigación Biomedico)

Fecha:	2020
Resumen:	The presence of bacteria resistant to antibiotics, such as Staphylococcus aureus resistant to methicillin (MRSA), is becoming an increasing everyday concern for their implications for human and animal health. This is even more alarming when such bacteria are isolated in wild animals which, in principle, should not come into contact with antibiotics. This work studied 353 rabbits and 10 hares hunted in rabbit high-density areas. Of these, 41. 3% carried S. aureus in some sampled locations, of which 63. 3% were MRSA. These are surprising results given the unexpected high presence of MRSA in the studied animals. This finding is very worrying because these animals tend to enter the food chain with no veterinary control, which implies a risk for human health. Thus it is necessary to extend this study to other, less-populated areas with other animal species (ruminants, rabbit predators, hunting dogs, etc. ) or even water sources to obtain further knowledge about the origin of bacterial resistances in nature. The appearance of methicillin-resistant strains of Staphylococcus aureus (MRSA) in several animal species (including rabbits) has set off alarms for their capacity to act as reservoirs for this bacterium. This is especially important in wild animals given its epidemiological implications. The objectives of this study were to identify and characterize S. aureus, specifically MRSA, strains in wild lagomorph high-density areas. Ten hares and 353 wild rabbits from 14 towns with a high rabbit density in the Valencian region (eastern Spanish coast) were sampled. Swabs from the nasal cavity, ears, perineum and lesions (when present) were taken for microbiological studies. The detection of different genes and antibiotic susceptibility studies were also carried out. Of all the animals, 41. 3% were positive for S. aureus, of which 63. 3% were MRSA. Ears were the anatomical location with more S. aureus and MRSA strains. The more frequently identified MLST type was ST1945 (97. 1%, 136/140). The mec A gene was found only in one sample. The rest (n = 139) carried the mec C gene and were included in CC130, except one. Penicillin resistance was detected in 28 mec -negative isolates and, in one case, bacitracin resistance. mec A isolate presented resistance to enrofloxacin and tetracycline, and 10 mec C isolates also showed bacitracin resistance. No MRSA isolate was positive for genes chp, sea, tst and PVL. Two ST1945 isolates contained IEC type E (comprising genes scn and sak). mec A-isolate was positive for bla Z. Of the 28 MSSA strains showing resistance to penicillin, 22 carried the bla Z gene. These surprising results highlight the marked presence of MRSA strains in wild rabbits in high-density areas.
Ayudas:	Ministerio de Educación, Cultura y Deporte FPU17/02708
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Materia:	Methicillin-resistant Staphylococcus aureus ; MRSA ; Mec C gene ; Wild rabbits ; High-density areas
Publicado en:	Animals, Vol. 10 (june 2020) , ISSN 2076-2615

DOI: 10.3390/ani10071109
PMID: 32610507

15 p, 1.0 MB

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