This book is a compilation of the latest whirling disease research findings, along with seven invited review papers in seven subtopics. It represents a peer-reviewed version of the proceedings of the 7th Annual Whirling Disease Symposium held in February 2001 in Salt Lake City, Utah. It is also much more than that, given the value of its extensive and thoroughly researched review papers. The volume will be a valuable resource for researchers in the field as well as a reference volume for managers who have to make decisions on controlling whirling disease.