Microbial contamination of main contact surfaces of automated teller machines from Metropolitan Area of Porto

Joana Inês Bastos Barbosa, Helena da Conceição Pereira Albano, Fabiana Ferreira Silva, Paula Cristina Maia Teixeira*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Automated Teller Machines (ATM) are likely to be contaminated with various microorganisms because of their contact with the hands of many users daily. The main objective of this study was to investigate ATMs as a potential source of bacterial contamination. This study was conducted in the Metropolitan Area of Porto, in which 50 swab samples were cultured on selective media. Some isolates were identified based on colonial, morphological and biochemical characteristics. Susceptibility to several antibiotics was also evaluated for each isolated organism. Most contaminated ATMs had high numbers of Enterobacteriaceae and Enterococci. Staphylococci and Enterobacteriaceae were the most prevalent bacteria found. The recovered bacterial isolates varied in their antibiotic resistance pattern; Staphylococcus spp. demonstrated the most resistant profiles. With this pioneering study in Portugal, it was demonstrated that although ATMs in metropolitan area of Porto were not highly contaminated, some potentially pathogenic bacteria were present and resistant to some commonly used antibiotics.
Original languageEnglish
Pages (from-to)208-221
Number of pages14
JournalInternational Journal of Environmental Studies
Volume77
Issue number2
DOIs
Publication statusPublished - 3 Mar 2020

Keywords

  • Antibiotic resistance
  • ATM
  • Microbial contamination

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