Mastitis represents a major challenge in dairy farming, since it is one of the affections that most impact the cattle herd, causing great economic distress. Bacteria are important agents associated with the disease, and the most commonly found are those of the genus Staphylococcus, associated with both clinical and subclinical manifestations. Antimicrobial therapy is usually required as a treatment, assisting the animal's defenses to eliminate the invading agent, and it is therefore of paramount importance to monitor the susceptibility of pathogens to antimicrobials. Since resistance to drugs commonly used has become frequent, there is a need for more comprehensive studies on the subject. Thus, the present study evaluated 300 isolates of Staphylococcus from samples of dairy cattle from dairy farms. The most prevalent species in the analyses were S. aureus, and among the genes coding for adhesins and biofilms the most frequent combinations were (eno, fib and fnbA) and (bap, icaA, icaD). The most frequent combination for adhesins was eno-fib-fnbA, and for biofilms they were bap and bap-icaD. The highest resistance indices were verified for betalactam antibiotics (amoxicillin, ampicillin and penicillin). The highest frequencies of sensitivity were identified for cephalothin, followed by oxacillin and gentamicin, and no concordance relationship was found between oxacillin and betalactam. Minimum inhibitory concentration (MIC) for ampicillin, gentamicin, oxacillin and penicillin were performed for all strains resistant to the antibiogram. Subsequently, the genes responsible for the encoding of antimicrobial resistance were investigated, with the femA and femB genes being the most common, but the femA gene was not detected in all strains of S. aureus. The mecA and blaZ genes were identified, but at low frequency, and the mecA homolog, mecA_LGA251, was only found in two strains. The information obtained can help in different aspects about the microorganisms' profiles regarding their virulence factors, allowing new approaches to therapies and mastitis prevention measures.