This book is a direct result of a symposium held in December 1988, in Washington, DC, honoring Professor Emeritus Miodrag Ristic for his contributions to rickettsial disease research, in general, and, to ehrlichiosis, in particular. He and his colleagues in the United States Army Medical Research Unit brought to the world's attention an epidemic of ehrlichiosis, that occurred in German shepherd dogs during the Vietnam War. The group was able to culture the microorganism Ehrlichia canis and to fulfill Koch's postulates. They eventually developed an indirect immunofluorescent antibody (IFA)...