Harrie Phillips

PGCertClinEd, BAdVocEd (VocEd&Trng), DipVN (Surgical, ECC), DipTAE (Development & Design), DipBus, TAA, MACE

Veterinary Nurse
Veterinary Nurse

Stethoscopes, a vital tool in medical practice, are often overlooked as fomites, leading to potential transmission of pathogens between patients. Despite the minimal risk associated with skin contact, it is essential to clean stethoscopes regularly to prevent cross-contamination. In this blog, we will discuss the importance of stethoscope cleaning in veterinary practices and the recommended cleaning protocols.

Stethoscopes as Fomites

Various human-based studies have reported that stethoscopes can be contaminated with pathogens like Staphylococcus aureus, with contamination rates ranging between 80% and 100% (Álvarez et al., 2016). Veterinary literature on this topic, however, is sparse.

A study conducted by Fujita, Hansen, and Hanel (2013) revealed that most veterinary clinicians clean their stethoscopes only when visibly contaminated or when dealing with immunocompromised patients, leading to bacterial contamination rates of 60-67%. The study also found that cleaning stethoscopes with 70% isopropyl alcohol after each patient contact is 100% effective at removing the bacterial load..

Effectiveness of Cleaning Agents

Fujita, Hansen, and Hanel (2013) concluded that using 70% isopropyl alcohol to clean stethoscope diaphragms after each patient contact is an effective method to prevent nosocomial infections, a finding supported by Nunez, Moreno, & Green et al. (2000). Another study found no statistical difference in using 70% isopropyl alcohol and ethanol-based hand cleaners (EBC) for cleaning stethoscopes, deeming both products effective in reducing bacterial contamination (Lecat et al., 2009).

Since alcohol evaporates quickly and is only effective at killing bacteria when present, recolonization can occur when cleaning compliance is low. Alvarez et al. (2016) suggested that using chlorhexidine in the cleaning protocol could improve overall bacterial contamination levels due to its residual effect and substantivity. Their study found that chlorhexidine prevented stethoscope recontamination for at least 4 hours post-disinfection.


The manufacturer’s instructions should be followed for cleaning stethoscopes, but generally, wiping them with 70% isopropyl alcohol between each patient is sufficient. Soapy water may be necessary for heavy organic contamination. Fujita, Hansen, and Hanel (2013) suggested spraying the stethoscope diaphragm with 70% isopropyl alcohol, wiping it in a circular fashion with gauze five times, spraying it again, and allowing it to air dry. The tubing should also be cleaned.
To ensure optimal cleaning, it is recommended to use a back and forth mechanical action rather than just wiping. Stethoscopes should not be shared between individuals, and ear tips should be removed for cleaning.


The Takeaway Message

Regular cleaning of stethoscopes in veterinary practices is crucial to prevent the transmission of pathogens between patients. Using 70% isopropyl alcohol or other effective cleaning agents and following the recommended cleaning protocol will help reduce the risk of nosocomial infections and improve overall patient care.

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Infection Control Practices for Veterinary Clinics


Infection control in the veterinary clinic is vital not only for patient health, but also for veterinary staff, clients and the general public.

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Álvarez, J.A., Ruí, S.R., Mosqueda, J.L., León, X., Arreguín, V., Macías, A.E., & Macias, J.H. (2016). Decontamination of stethoscope membranes with chlorhexidine: Should it be recommended? American Journal of Infection Control, 44, 205-209.

Fujita, H., Hansen, B., & Hanel, R. (2013). Bacterial Contamination of Stethoscope Chest Pieces and the Effect of Daily Cleaning. Journal of Veterinary Internal Medicine, 27, 354-358.

Lecat, P., Cropp, E., McCord, G., & Haller. N.A. (2009). Ethanol-based cleanser versus isopropyl alcohol to decontaminate stethoscopes. American Journal of Infection Control, 37, 241-243.

Nunez, S., Moreno, A., Green, K., et al. (2010) The stethoscope in the emergency department: a vector of infection? Epidemiology and Infection, 124, 233–237.

Every due care has been taken to ensure the information herein is based on sources Veterinary Nurse Solutions believe to be reliable but is not guaranteed by us and does not purport to be complete or error-free. As such, we do not warrant, endorse or guarantee the completeness, accuracy, and integrity of the information. You must evaluate, and bear all risks associated with, the use of any information provided hereunder, including any reliance on the accuracy, completeness, safety or usefulness of such information. As part of our quality control of information contained within this document, it has been peer-reviewed by qualified veterinary nurses and/or veterinarians. Veterinary Nurse Solutions acknowledges that there is more than one way to carry out many of the tasks described within this website, and techniques omitted are not necessarily incorrect.  Veterinary Nurses should always undertake these tasks under either direct or indirect supervision of a registered veterinarian, as required by their local legislation and regulations.