Hannah GarrisonJongarrison [creativecommons license] via Wikimedia CommonsResults of a new study by researchers at Yale University School of Medicine (New Haven, CT) may point to the cause of persistent arthritis in people with Lyme disease. About 10% of Lyme sufferers will experience Lyme-related arthritis; in about 10% of these cases, the arthritis can last for months, despite antibiotic therapy. Its pathology is poorly understood.