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Antimicrobial resistance is prevalent in healthy pigs

M. Pirolo, A. Gioffrè, D. Visaggio and others

BMC Microbiology (2019) 19

doi: 10.1186/s12866-019-1422-x

• What did the research find?

Meticillin-resistant Staphylococcus aureus (MRSA) was found on 22 of the 32 pig farms tested, with an average prevalence of 46.1 per cent. MRSA colonisation was significantly higher in the intensive farms. All MRSA isolates were found to be resistant to tetracycline. High resistance rates were also found for clindamycin (93.1 per cent), trimethoprim (68.4 per cent), fluoroquinolones (47.9 to 65.3 per cent) and erythromycin (46.1 per cent). Overall, a multidrug-resistant phenotype was observed in 88.6 per cent of isolates.

• How was it conducted?

A total of 475 healthy pigs from 32 farms in the Calabria region of Italy were sampled by nasal swabbing. Of the farms included in the study, 25 were intensive. The samples were screened using selective culture to isolate MRSA. The genomic DNA of the MRSA isolates was then …

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