Molecular Typing and Antimicrobial Susceptibility Profile of <em>Staphylococcus aureus</em> Isolates Recovered from Bovine Mastitis and Nasal Samples

• DOI: 10.20944/preprints202009.0115.v1
• Publication Date: 2020-09-07T05:38:27Z
• Authors: Renata P. Santos; Fernando N. Souza; Ana Claudia C. Ol...; Antônio F. de Sou...; Juliana Aizawa; Luisa Z. Moreno; Adriano F. da Cunha; Adriana Cortez; Alice M. M. P. De...; Marcos B. Heinemann; Mônica M. O. P. C...
• Keywords: Broth microdilution

In the present study, we aimed to determine antimicrobial resistance and genetic structure of a population S. aureus recovered from transient persistent intramammary infections nares/muzzles. We investigated 189 strains using broad susceptibility profile. Furthermore, 107 isolates were strain-typed staphylococcal protein-A (spa) typing. Here, great proportion exhibited multidrug antimicrobials, including critically important although no methicillin-resistant found. Our study did not strengthen idea that extramammary niches (i.e., nares/muzzles) are an source for aureus. A discrepancy in between isolated nasal/muzzles milk samples was observed. IMIs differ by spa typing, suggesting persistence bovine determined cow factors. Thus, high level multidrug-resistant found two herds studied together with predominance well udder-adapted strain may contribute history prevalence mastitis caused aureus, leading animal public health concerns.