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Are our stethoscopes contaminated ?
Background:
Health care-associated infections are a real public health problem. Contaminated medical equipments such as stethoscopes are often an overlooked vector. In our study, we were interested in proving our doctors stethoscopes contamination and in studying the microbiological profile of isolated germs.
Methods:
This was about a cross-sectional study that lasted 2 months (May and June 2014) including 39 personal stethoscopes of all grade doctors working in 8 different departments in Habib Thameur Hospital. The swabs were taken from the membranes of the stethoscopes and sent quickly to our bacteriology service. Then, the bacteriological samples were subcultivated on blood agar. The reading tooks place 24 hours later. Were considered positive the cultures that contained more than 104 colony forming units/ml. Then we proceeded to the identification of the germ.
Results:
Fifteen samples from 39 were positive that was 38 %. The coagulase- negative Staphylococcus was the predominant germ. The pathogenic germs were found in 5 positive samples that was 12 % from all the samples. They were distributed as follows: 2 Methicillin-susceptible Staphylococci Aureus, 2 methicillin-resistant coagulase- negative Staphylococci and one Pseudomonas aerogenusa. The pathogenic germs were found in stethoscopes taken from cardiology and intensive care unit (ICU). In cardiology, 7/9 stethoscopes were positive (5 coagulase- negative Staphylococcus among them 2 resistant methicillin and 2 Staphylococcus aureus.) In ICU, 6/13 stethoscopes were positive among them one Pseudomonas aerogenusa.
Conclusion:
The stethoscopes constitute bacterial reservoirs. It is necessary to perform a procedure for the good practices of disinfection.
Insights
Doctors' stethoscopes are frequently contaminated, posing a public health risk. A study found 38% of stethoscopes harbored bacteria, including pathogenic Staphylococcus aureus and Pseudomonas aeruginosa, highlighting the need for disinfection protocols.
Area of Science:
- Microbiology
- Infectious Diseases
- Public Health
Background:
- Health care-associated infections (HAIs) are a significant public health concern.
- Medical equipment, particularly stethoscopes, can act as overlooked vectors for pathogen transmission.
- Understanding stethoscope contamination is crucial for infection control strategies.
Purpose of the Study:
- To investigate the prevalence of bacterial contamination on doctors' stethoscopes.
- To identify the microbiological profile of bacteria isolated from stethoscopes.
- To assess the role of stethoscopes in healthcare-associated infections.
Main Methods:
- A cross-sectional study was conducted over two months, involving 39 stethoscopes from doctors in eight hospital departments.
- Swabs were collected from stethoscope membranes and cultured on blood agar.
- Cultures exceeding 10^4 colony-forming units/ml were considered positive, followed by germ identification.
Main Results:
- 38% (15/39) of stethoscopes showed bacterial contamination.
- Coagulase-negative Staphylococcus was the predominant bacteria.
- Pathogenic bacteria, including Staphylococcus aureus and Pseudomonas aeruginosa, were identified in 12% (5/39) of samples, notably from cardiology and ICU departments.
Conclusions:
- Stethoscopes serve as significant reservoirs for bacteria, including potential pathogens.
- Effective disinfection procedures for stethoscopes are essential to mitigate infection risks.
- Implementing disinfection protocols is necessary to improve healthcare hygiene practices.
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