Checking Germs to Protect New Joints

Scientists studied a germ called Staphylococcus aureus. This germ is the most common cause of infected joints. It also causes surgical site infections. The nose can hold the germ. This is a known risk factor. Still, experts debate routine screening and decolonization. The goal was to lower infection risk. This question guides the research.

The study was retrospective. It compared two patient groups. It included 2,507 elective joint replacement procedures. The procedures happened between January 2022 and December 2024. The study took place at one center in Italy. In 2024, patients had nasal swabs. The swabs checked for MSSA and MRSA. Positive patients got a decolonization plan. The plan used mupirocin nasal ointment. It also used chlorhexidine showers. These steps happened before surgery. The control group came from 2022 to 2023. That group had no screening or decolonization. The team compared the results with past data. The aim was to find a safety step.

In 2024, 988 patients were screened. Twenty-three point two percent had a positive MSSA test. One point eight percent had a positive MRSA test. No joint infections from MSSA or MRSA happened in 2024. In the prior two years, three such infections were found. The study recorded 11 joint infections overall. The rate was 0.44 percent. The numbers came from patient records. The team wanted to know what worked.

All infections in 2024 happened in patients who tested negative. The lower infection rate was not statistically significant. The p value was 1.00. The team saw a trend. The trend suggested screening and targeted decolonization may help. The team said more study may be useful. The study left questions open.