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Our study assessed bacteria on swabs taken from the surface of the diaphragm of stethoscopes used by medical students in Nigeria. We found bacterial contamination on 80.1% of the stethoscopes. Staphylococcus aureus and Pseudomonas aeruginosa were major isolates. Bacterial colonization was highest among stethoscopes cleaned with only water and those never cleaned with any agent or never cleaned at all. The difference was statistically significant (chi2 = 31.9, p < .05). Stethoscopes from students who cleaned them after use on each patient and from those who practised handwashing after contact with each patient had significantly lower bacterial contamination (chi2 = 26.9; p < .05 and chi2=31.9, p < 0.05, respectively). Isolates of Staphylococcus aureus showed the highest susceptibility to antibiotics, while the most effective antibiotics were Ciproflox and Erythromycin. Integration of stethoscope care in the training curriculum of medical schools will enhance the control nosocomial infections.

Bacteriological Assessment of Stethoscopes Used by Medical Students in Nigeria: Implications for Nosocomial Infection Control