The purpose of the questionnaire was to gain an insight into the state of the art and to give direction to control measures for, and research into, bovine respiratory disease. Workers with an active interest in bovine respiratory disease were asked to respond. With the approval of the Committee on Large Animal Practice, it was distributed in Canada by the office of the Canadian Veterinary Medical Association to the veterinary colleges, the federal animal diseases research laboratories and the directors of provincial veterinary services for further distribution, and also to the Veterinary Infectious Diseases Organization and Connaught Laboratories.Twenty-six questionnaries were returned and one letter was received in response. Replies were from 13 research scientists (including clinicians), six laboratory diagnosticians, four regulatory workers, three administrators, and one person of unknown specialization.