Researchers at Stanford Medicine have found that the drug azlocillin can eliminate the bacteria that cause Lyme disease in lab mice and cultures. The study provides evidence that azlocillin can kill both the actively replicating and semi-dormant forms of the bacteria, as well as drug-tolerant persisters. Lyme disease is a common vector-borne disease that affects over 300,000 people in the US each year, and current treatments do not work for up to 20% of patients. Further research is needed to determine the effectiveness of azlocillin in humans.