Rossi, Bruna F. [UNESP]Bonsaglia, Érika C. R. [UNESP]Castilho, Ivana G. [UNESP]Dantas, Stéfani T. A. [UNESP]Langoni, Hélio [UNESP]Pantoja, José C. F. [UNESP]Júnior, Ary Fernandes [UNESP]Gonçalves, Juliano L.Santos, Marcos V.Mota, Rinaldo A.Rall, Vera L. M. [UNESP]2020-12-122020-12-122020-07-20BMC Veterinary Research, v. 16, n. 1, 2020.1746-6148http://hdl.handle.net/11449/201963Background: Staphylococcus argenteus is a new specie positive coagulase staphylococci. We investigate the presence of S. argenteus in isolates previously classified as S. aureus, obtained from the milk of cows with mastitis in Brazil. Results: Among 856 S. aureus tested in chocolate agar, tryptone soya agar and salt egg yolk agar, white or colorless colonies were observed in 185 (21.6%) isolates. Regarding the ctrOPQMN operon, 111 (60%) presented the complete cluster. Despite some missing genes in this cluster, the remaining strains (74) were confirmed as S. aureus using the nrps gene. Conclusions: As far as we know, this is the first review of S. aureus collection in Brazil and S. argenteus does not appear to be a significant problem in Brazilian herds.engnrps geneS. aureus complexSalt egg yolk agarStaphyloxanthinArtigo10.1186/s12917-020-02472-72-s2.0-85088352124