Microbial Contaminants on Inanimate Surfaces and Non-critical Instruments at a Major Reference Hospital in Makurdi, Nigeria

Abstract

Aims: There have been links between healthcare-acquired infections, contaminated surfaces, and medical instruments. The aim of this study was to: (i) investigate the variety of microorganisms that persist on inanimate/noncritical devices at Benue State University Teaching Hospital Makurdi, Nigeria, as a possible source of healthcare-acquired bacterial and fungal infections, and (ii) determine the prevalence of microorganisms on the instruments sampled. Study design: This study was a hospital-based cross-sectional study. Place and duration of study: Microbiology Laboratory (Bacteriology, Media/Washroom, Serology, and Phlebotomy Units), Benue State University Teaching Hospital Makurdi, Nigeria, between January 2021 and May 2021. Methodology: Swab specimens were collected from  tables (14), sinks (8), hand jars (7), scissors (5), inoculating loops (7), refrigerators (6), and autoclaves (3) using sterile stick swabs. The bacterial and fungal investigation was performed using standard culture tests-gram stain, colony morphology, and biochemical tests. Results: All the samples tested positive for either bacteria or fungi, indicating a contamination rate of 100%. Tables were the most contaminated (28%), sinks (16%), inoculating loops (14%), hand jars (14%), refrigerators (12%), scissors (10%), and autoclaves (6%). Salmonella spp., Staphylococcus aureus, Streptococcus spp., Pseudomonas aeuroginosa, Escherichia coli, Klebsiella pneumonia, and the fungi Aspergillus niger and Candida albicans were identified. Conclusion: The results of this study have shown that hospital surfaces and healthcare-associated equipment is a potential source of nosocomial infections for patients, visitors, and health care workers. Hospitals should enforce regular cleaning and decontamination to forestall the occurrence of nosocomial infections.