Casey Stoner has been diagnosed with a slight gastritis and mild anaemia after the Australian underwent further tests in the United States last week.
Stoner has been affected by the illness since the Catalunya Grand Prix and doctors were yet to discover the reasons for his slump during the races. After staying in the United States following the Laguna Seca race, the former world champion underwent further tests and was finally given a verdict. The Australian says he will now follow the doctors' indications to try and make a full recovery.
Ducati said doctors are sure that with the right treatment, Stoner will be back to full fitness in a matter of weeks.
"I have been in USA until Saturday to do all the tests," Stoner said. "First of all, I'd like to thanks all the doctors involved in this, Dr. Ting and Dr. Tuan in the Fremont Surgery Center, Dr. Macchiagodena, Dr. Catani, Dr. Ceccarelli and of course my physiotherapist Freddy. Hopefully, step by step I will feel better with their indications. I still don't feel like I am 100% but the biggest problem now is the ribs that are very painful after the crash in the USA GP qualifying.
"It will be probably another hard weekend, but as always, we will do our best to stay as much as possible close to the lead of the championship."
Team boss Livio Suppo added: "This is a delicate time for Casey but we know he is made of stern stuff. He will continue to fight like a lion, as he has done in the past few races, even though the crash at Laguna left hits mark on him and that certainly won't help.
"Nicky again rides at a circuit where he has always gone well at in the past and I'm sure he will be able to confirm that the improvement made at Laguna is only the start!"