Multidrug-resistant bacteria isolated from automated teller machine in metropolitan area of São Paulo, Brazil

The aim of this study was to investigate bacterial contamination on surfaces randomly selected Automated Teller Machine and their sensitivity antibiotics in São Paulo city, Brazil. swabs collected aseptically were inoculated selective non-selective media triplicate incubated at 37 °C for 24 h. After Gram staining the isolated colonies, complementary biochemical tests applied. antibiotic pattern all isolates (15 Gram-positive bacteria 7 Gram-negative bacteria) determined using Kirk Bauer method chloramphenicol, clindamycin, norfloxacin, erythromycin, gentamicin tetracycline diffusion discs. All ATM tested contaminated with least one genus bacteria. most frequently Staphylococcus aureus (64%), Enterococcus spp. (28%) Acinetobacter (21%), followed by coagulase-negative staphylococci (14%), Pseudomonas 12 Salmonella (7%), Escherichia coli (7%). ATMs metropolitan region shown be that are resistant commonly used antibiotics. multidrug-resistant, however, strains sensitive (S) or showed an intermediate response profile (I) tetracycline, exception three spp., aureus, which tetracycline. Norfloxacin resistance Based these findings, it is recommended perform hand washing use antiseptics after ATMs.