Bacteriological examinations were done with 38 Indian patients from the Suruí and 58 patients from the Karitiana groups, in the State of Rondônia, Brazil. Among the Suruí, S. aureus was isolated in 10 (26.3%) individuals and S. epidermidis in 25 (65,8%). In the Karitiana population, S. aureus was recorded from 21 (36.2%) patients and S. epidermidis from 42 (72.4%). Sensibility tests to different drugs were done with all strains of S. aureus isolated. The Authors discuss the role of assymptomatic carriers of these bacteria in the oral and nasal cavities, as well as some aspects related to its transmission and the prevalence of pyoderma infections within Indian population.