A large amount of material on Coccidiosis at "Coccidiosis Management for Natural and Organic Poultry"

(http://www.thepoultrysite.com/publications/2/Coccidiosis%20Management)

I am not a fan of the organics movement (I think it is mostly a marketing ploy), but the site has a lot of good information about Coccidiosis: varieties, life cycle, transmission, treatment options (natural, drugs), etc.

Richard