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Study reveals best practice hand washing technique for bacteria removal

New research demonstrates that the six-step hand-hygiene technique recommended by the World Health Organisation is superior to a three-step method suggested by the U.S. Centers for Disease Control and Prevention (CDC) in reducing bacteria on healthcare workers’ hands. 

The study was published online in Infection Control & Hospital Epidemiology, the journal of the Society for Healthcare Epidemiology of America.

Jacqui Reilly, PhD, lead author of the study and professor of infection prevention and control at Glasgow Caledonian University in Scotland, commented:

“Hand hygiene is regarded as the most important intervention to reduce healthcare-associated infections, but there is limited evidence on which technique is most effective. This study provides a foundation for effective best practices to implement on the frontlines of healthcare.”

During the randomised controlled trial in an urban, acute-care teaching hospital, researchers observed 42 physicians and 78 nurses completing hand-washing using an alcohol-based hand rub after delivering patient care. The six-step technique was determined to be microbiologically more effective for reducing the median bacterial count (3.28 to 2.58) compared to the three-step method (3.08 to 2.88). However, using the six-step method required 25 per cent more time to complete (42.50 seconds vs. 35 seconds).

 Reilly added:

“One of the interesting incidental findings was that compliance with the six-step technique was lacking. Only 65 per cent of providers completed the entire hand hygiene process despite participants having instructions on the technique in front of them and having their technique observed. This warrants further investigation for this particular technique and how compliance rates can be improved.”

The researchers recommend authors of international guidance should consider this evidence when making official recommendations on best practices in hand hygiene.

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