Foci of bovine paratuberculosis which were found recently in Poland, made a need for taking up investigations on early diagnosis of the disease. According to publications of many autors (1, 2, 4, 5) diagnosis of Johne's disease before characteristic clinical symptoms are appeared is difficult. The purpose of this work was to investigate reactions to johnin, avian, and mammalian tuberculins in cattle infected with M. johnei and to confront the results of allergic tests with those of post-mortem and laboratory examinations.