Just on the topic of their poo (which is always a nice after dinner topic LOL) one of my male friends spent 3 months last year in bed having caught toxoplasmosis (sp?) and was basically vomiting pretty much all the time for the first 6 weeks
He lost a lot of weight.
He doesn't own a cat and doesn't know how he caught it, but his doctor was sure that it had come from a cat. Another friend of mine caught it a few years ago from one of her own cats and it was a similar situation, knocked her off her feet for a few months.
You do have to be really careful. Other cats always poo in our garden and they never dig down, they often just go on the grass.. yuck.