An informal study conducted by the American Lyme Disease Alliance (ALDA), found that most patients diagnosed with Chronic Fatigue Syndrome (CFS) were actually suffering from Lyme disease. Out of a group of CFS 31 patients, 28 were found to be ill as a result of Lyme. One patient was determined to have an unrelated illness (brain aneurysm). Only two patients in the study (6.3%) were suffering from CFS. All 31 patients had previously been tested for Lyme with negative results. After repeat testing during the study, a minority did test positive; however, because of known inaccuracy of the Elisa and Western Blot tests, the study was based on response to antibiotics.In those who responded to antibiotic treatment, almost 10% were cured or experienced a remission. More than 15% were able to return to school or work. The others who did not still were able to perform more tasks and felt better overall. All felt they would continue to improve as long as the treatment was extended, though many had doubts as to whether they would ever be cured.