Study: MRSA pneumonia cases among hospitalized US patients on the decline

Methicillin-resistant Staphylococcus aureus pneumonia incidence has decreased among patients at U.S. hospitals, accompanied by improvements in mortality rates, according to a study published in the American Journal of Infection Control.

Researchers conducted a retrospective analysis of the National Inpatient Sample from 2009 to 2012. They included adult patients with a primary diagnosis of MRSA or methicillin-susceptible Staphylococcus aureus pneumonia.

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In all, researchers found 104,562 patients who had a primary diagnosis of Staphylococcus aureus pneumonia, with 81,275 being MRSA pneumonia.

The study shows that MRSA pneumonia prevalence decreased steadily from 75.6 cases per 100,000 discharges in 2009 to 56.6 cases per 100,000 discharges in 2012, while MSSA pneumonia experienced a slight decrease.

MRSA pneumonia-related mortality rates dropped from 7.9 percent to 6.4 percent between 2009 and 2012, and MSSA pneumonia-related mortality rates decreased from 6.9 percent to 4.7 percent.

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