Australian handwashing campaign reduces incidence of Staphylococcus aureus infection in hospitals, with nurses leading the way

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The past decade has seen significant, sustained improvements in hand hygiene compliance among Australian healthcare workers, with reduced risks of potentially fatal healthcare-associated Staphylococcus aureus infection. And nurses have consistently led by example with the highest hygiene compliance, according to new research into the Australian National Hand Hygiene Initiative (NHHI), published in The Lancet Infectious Diseases

The analysis found a significant improvement in hand hygiene compliance in hospitals nationally; from 64% (36,213 of 56,978) of potential hand hygiene opportunities (moments) in 2009 to 84% (494,673 of 586,559) in 2017.

While compliance steadily improved for each healthcare worker type (e.g., doctor, nurse, and allied health), adherence was consistently 10%-15% higher among nursing staff when compared to medical staff over the length of the 8-year study.

Changes in hand hygiene compliance for each of the four key health-care worker groups in Australian health-care facilities, 2010–17

In their paper, the researchers showed that for every 10% increase in hand hygiene compliance, there was an associated 15% decline in the incidence of S. aureus bloodstream infection in Australia's 132 largest public hospitals, which provide over three-quarters of all public inpatient care - over 15 million patients-days nationally in 2016-17.

Now in its 10th year, the NHHI's results were achieved by promoting the World Health Organization's "5 Moments for Hand Hygiene" to reduce the risk of healthcare associated infection - before touching a patient; before a clean procedure; after exposure to body fluids/wounds; after touching a patient; and after touching a patent's surroundings. The national culture-change programme could be a template for similar initiatives in other countries, the researchers say.

"Hospital-acquired infections are a major concern for hospitals around the world and S. aureus is among the most dangerous," says Professor Lindsay Grayson from Hand Hygiene Australia who led the research. "The risks to patients are enormous, as are the associated hospital costs. Despite robust evidence supporting improved practices for hand hygiene, securing compliance is notoriously difficult, and few national programmes have been sustained in the long-term."

S. aureus is the leading Gram-positive bacterium responsible for hospital-acquired infections including endocarditis, acute pneumonia, and sepsis. S. aureus infections are linked to poor hand hygiene compliance.

In the study, Grayson and colleagues analysed outcomes of the NHHI in the 8 years after its implementation - from January 2009 to June 2017. All hand hygiene compliance auditing was done by direct observation three times a year (measured as a percentage of observed moments), and the clinical impact of the programme was assessed by linking data on hospital-level incidence of S. aureus infection with hospital-level hand hygiene compliance.

The researchers point out that a negative correlation between annual change in hand hygiene compliance and annual change in S. aureus infection at the hospital level (especially for the largest hospitals), suggests that declines in S. aureus infection were not simply time dependent, but were more likely associated with changes in hand hygiene compliance.

"The National Hand Hygiene Initiative has achieved impressive results, both in terms of improving healthcare worker hand hygiene compliance and its association with reduced rates of healthcare-associated staphylococcal bacteraemia. Few national programmes have become successfully integrated into national health-care structures", says Professor Grayson.

The authors note several limitations including that hand hygiene compliance reported in the NHHI is likely to be better than average real-world compliance since some of the auditing was done during evening or night shifts or on weekends, and healthcare workers are far more likely to comply with hand hygiene guidelines when they know they are being watched. Whilst auditors were trained to accurately record hand hygiene compliance in a busy clinical setting, the authors cannot be sure that all 'Moments' were captured. Finally, they note that while a strong link between improved hand hygiene compliance and declining incidence of S. aureus infection was found, other factors such as viral respiratory outbreaks or antimicrobial stewardship programmes may have had some impact.

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