Bacterial Contamination of Multi-User Computer Keyboards’ Interface in a Tertiary Institution, Abia State, South Eastern Nigeria

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E. O. Nwankwo
K. N. Onusiriuka
I. G. Daniel


Bacterial contamination and antibiogram of multi-user computer keyboard interface in various parts of Michael Okpara University, Umudike was evaluated. A total of 100 moistened swab samples of computer keyboard interface were collected from different locations within the University community, inoculated on solid culture media and incubated aerobically for 24hours at 370C. Isolation and identification of bacteria were done by standard microbiological techniques. Antibiotic susceptibility testing was carried out by disc diffusion. One hundred and four (104) bacterial isolates comprising eight (8) different bacteria genera were observed. These include; Staphylococcus aureus (12.5%), Coagulase negative Staphylococcus (6.7%), Streptococcus spp (5.7%), Bacillus spp (25%), Escherichia coli (34.6%), Klebsiella spp (5.7%), Proteus spp (2.8%) and Pseudomonas aeruginosa (6.7%). Computer village had the highest incidence of profuse bacterial contamination of keyboards (Streptococcus spp; 73.6±14.8). Antibiotic sensitivity testing of isolates revealed a mild pattern of resistance to commonly available antibiotics. The study has shown that multi-user computer keyboards can habour several populations of bacterial pathogens that can lead to community acquired infections in a university community.

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