Mouth rinse could replace painful lung tests for pneumonia diagnosis

This study tested whether a simple saltwater mouth rinse can detect pneumocystis, a lung infection that can be life-threatening for people with weak immune systems (like those with HIV, cancer, or organ transplants). Current diagnosis requires coughing up lung fluid or a tube inserted into the lungs, which can be uncomfortable and time-consuming. Researchers collected mouth rinse and blood samples from over 1,000 participants to see if new lab techniques could make diagnosis easier and less invasive.