Not sure if it will be possible to get hold of the presentation but Dr Wheldon might know the presenter or might seek to contact him after the conference.
Well, you never know! It depends whether whoever it is can culture CPn or can't, but you will be able to learn more about such things in a few days from http://www.CPn Help.org/
The Powerpoint presentation on the left by Charles Stratton, is very illuminating. It helps me to see why I recovered on that treatment even with having a negative serology reading.