"The illness that floored swimmer Ian Thorpe has been diagnosed as a strand of glandular fever, which is likely to haunt him for the rest of his career...
It was the second time he had been hit by the virus that cannot be specifically treated and can return during periods of intense exercise or stress. Grant Hackett also battles glandular fever...."
Article: Thorpe illness could resurface http://www.news.com.au/story/0,10117,18816568-2,00.html
Article: Thorpe has glandular fever: http://www.smh.com.au/news/sport/thorpe-has-glandular-fever/2006/04/15/1144521537393.html