Objetive: The objective of the present study was to determine the presence of Staphylococcus aureus (S. aureus) in the students of the course of Surgery Buco Máxilo Facial I of the Faculty of Dentistry-USMP after the surgical hand washing. Materials and Methods: Students were divided into 4 groups: Group A: Students who performed the technique of surgical hand-washing with a brush using chlorhexidine soap, Group B: Students who performed the technique of surgical hand washing by friction (without brush) using chlorhexidine soap, Group C: Students who performed the technique of surgical hand-washing with a brush using glycerin soap, Group D: Students who performed the technique of surgical hand washing by friction (without brush) using glycerin soap. In each group the presence of S. aureus was determined and compared between the four. Results: In all of groups there was presence of S. au...