In vitro antimicrobial sensitivity of staphylococci isolated in the Santa Cruz region of Bolivia.

The in vitro antimicrobial susceptibility of staphylococci isolated in two different communities, Camiri and Javillo, of the Santa Cruz region in south-eastern Bolivia was tested by the agar diffusion technique and by a micro dilution susceptibility test to determine the Minimum Inhibitory Concentrations. Staphylococcal strains isolated from hospital staff of the Camiri Hospital were compared to that isolated from healthy people of Javillo, a very small community isolated in the jungle. In the Camiri Hospital, staphylococci showed a high prevalence of penicillin resistance, 100% for S. aureus strains and 73.5% for coagulase-negative staphylococci. Among coagulase-negative strains we found a high rate of multiresistant strains, mainly to ampicillin, tetracycline and chloramphenicol. In the rural population of Javillo we found staphylococcal strains highly susceptible to all the antibiotics tested.