Thank you for the response.
However, I don't understand how the Bilharzia could have had this effect. According to the NIH (
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3230106/) Chris must have had a chronic infection; especially if it lasted three years (the length of time his performance was suppressed by my analysis).
Chronic Bilharzia manifests as either urinary or intestinal schistosomiasis. Considering that Chris hasn't suffered hepatic fibrosis (liver damage - typically irreversible) and nobody has mentioned renal pathology (kidney problems), he must have had a fairly non-severe (relatively speaking!) infection. Praziquantel was also successful at treating the infection, suggesting a minor pathology.
So what I don't get is that Chris had a chronic infection for at least three years (that's as far as my analysis goes due to lack of data pre 2008), and didn't suffer any of the typical symptoms (liver, kidney problems) other than fatigue, which is actually associated the acute version of the infection and is called Katayama syndrome. If Chris had Katayama syndrome, he would also have likely had a cough, headache, fever, bloody pee, bloody stool or other symptoms.
Anyways, I don't understand how Chris had Bilharzia for three years and only suffered minor fatigue that lowered his FTP by 20%.
John Swanson