Decreasing antibiotic use can reduce transmission of multidrug-resistant organisms

Decreasing antibiotic use can reduce transmission of multidrug-resistant organisms
 
Reducing antibiotic use in intensive care units by even small amounts can significantly decrease transmission of dangerous multidrug-resistant organisms (MDROs), according to new research published online today in Infection Control & Hospital Epidemiology, the journal of the Society for Healthcare Epidemiology of America. Researchers developed models to demonstrate the impact of reducing antibiotics by 10% and by 25%, and found corresponding reductions in spread of the deadly bacteria of 11.2 percent and 28.3 percent, respectively. “Antibiotic exposure is the most significant driver of resistance. In the hospital setting, nearly 50 percent of all patients receive an antibiotic, including up to 75 percent of all critically ill patients,” said Sean Barnes, Ph.D., Assistant Professor of Operations Management in the Robert H. Smith School of Business at the University of Maryland, and lead author of the study. “But what is really troubling is that nearly half of all antibiotics prescribed may be inappropriate. Even moderate reductions in antibiotic use can reduce transmission of MDROs.” Many hospitals and health systems in the U.S. are making efforts to reduce unnecessary antibiotic use through antimicrobial stewardship programs and various interventions to help ensure that patients get the right antibiotics at the right time for the right duration. Research has demonstrated the benefits of these measures on patient care and costs, but the impact on the rate of MDROs has been difficult to assess. To do so, researchers used a mathematical model, known as agent-based modeling to simulate the interactions between patients and healthcare workers. In the model, some patients were designated as colonized with an MDRO and a portion of patients received antibiotics (75 percent). The model assumed that transmission among patients occurred primarily via contaminated hands of healthcare workers.

Source: Decreasing antibiotic use can reduce transmission of multidrug-resistant organisms

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