2007 MotoGP World Champion Casey Stoner is currently undergoing an extensive battery of medical tests in California to get to the bottom of the mysterious illness that has been causing him extreme fatigue during recent races. Following the Grands Prix at Catalunya and Assen, Stoner was so fatigued that he required medical attention. Then the young Australian started feeling fatigued again just halfway through the first practice session July 3 at Mazda Raceway Laguna Seca. Stoner told reporters that he was already consulting medical personnel, but after the race weekend he went to Dr. Arthur Ting’s clinic in Fremont, California, where he immediately started a battery of tests at the hands of Dr. Ting and a team of specialists. Tests included blood work and an “upper GI” examination during which a tube with a camera is snaked down the throat to inspect the esophagus and stomach. Nothing has been found, according to a source with direct knowledge of the situation, except some minor inflammation in the stomach. One possibility being explored is the Epstein-Barr virus (EBV), which lies dormant in most people but can become active during times of extreme physical stress and cause infectious mononucleosis, which is often associated with chronic fatigue syndrome (CFS), according to the National Center for Infectious Diseases and Centers for Disease Control and Prevention (CDC) AMA racers Ben Bostrom, Mat Mladin and Larry Pegram have all had to deal with EBV and/or chronic fatigue syndrome during their careers. Symptoms associated with these conditions can last for months, and there is no cure or vaccine for infectious mononucleosis or chronic fatigue syndrome. Other than dealing with the individual symptoms, the primary treatment for infectious mononucleosis and chronic fatigue syndrome is rest. Stoner is being tested for EBV, but the results of that blood test had not come back yet as of Wednesday morning. An EKG is also planned, but Stoner is currently having too much pain from his highside crash during qualifying July 4 to run on a treadmill for the test. Officials from Marlboro Ducati have asked Stoner to remain at Dr. Ting’s clinic for the rest of the week and undergo as many tests as possible. While at Dr. Ting’s clinic, Stoner’s left wrist, which was re-injured last year and operated on by doctors in Europe over the off-season, was examined, and it was found that the bones in the wrist are not healing properly. Stoner’s complaints about recent arm pump were also looked into and he was found to have compartment surgery in his left forearm, but surgery to correct the situation will not take place until the season is over, according to our source.