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Role of Automated Teller Machine Keypads in the Proliferation of Bacteria: A Public Health Concern

Authors: Akinnibosun FI, Adetitun JA


The role of automated teller machine (ATM) keypads in the proliferation of bacteria was investigated in this research. Isolates and their prevalence in bank ATMs in Benin City were: Klebsiella sp. (8.16%), Pseudomonas aeruginosa (7.28%), Proteus vulgaris (8.83%), Escherichia coli (12.58%), Micrococcus luteus (3.75%), Bacillus subtilis (10.15%), Staphylococcus aureus (13.46%), Corynebacteria sp. (8.60%), Staphylococcus epidermidis (19.42%) and Streptococcus pyogenes (11.58%). Total heterotrophic bacterial count (THBC) by banks ranged from 1.16±0.43 × 102 cfu/cm2 (Bank I) to 2.22± 0.58×102 cfu/cm2 (Bank K). Total coliform count (TCC) ranged from Nil (Bank B and G) to 1.37 ± 2.11×102 cfu/cm2 (Bank I). By location and time, THBC ranged from 1.27 ± 0.63×102 cfu/cm2 (UUC) to 1.60 ± 0.43×102 cfu/cm2 (ER/RR) and 1.38 ± 0.57×102 cfu/cm2 (UUC) to 1.93 ± 0.61×102 cfu/cm2 (UR) for morning and afternoon respectively. TCC ranged from 0.52 ± 0.41×102 cfu/cm2 (UR) to 1.15 ± 0.57×102 cfu/cm2 (UUC) and 0.31 ± 0.50×102 cfu/cm2 (ER/RR) to 1.46 ± 1.49×102 cfu/cm2 (UUC) for morning and afternoon respectively. From the foregoing, it is pertinent to adopt measures aimed at preventing outbreak of diseases from ATM use.

Affiliations: Department of Microbiology, Faculty of Life Sciences, University of Benin, PMB 1154, Benin City, Edo State, Nigeria.
Keywords: Automated Teller Machine, Bacteria, Cross Contamination, Hygiene, Prevalence
Published date: 2018/12/30

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ISSN: 2635-3342 (Print)

ISSN: 2635-3350 (Online)

DOI: In progress

ISI Impact Factor: In progress

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Chemical Engineering Department, Faculty of Engineering, University of Benin, PMB 1154, Ugbowo, Benin City, Edo State, Nigeria.