QUESTIONS 375 



cylindrical, in slightly curved, and in club-shaped forms. It has 

 the same staining properties as the tubercle bacillus, is acid-fast, and 

 apparently can well withstand long washing in alcohol. 



Attempts to cultivate the bacillus, as well as animal inoculations, 

 have so far been unsuccessful. Since the disease always appears to 

 lead to a fatal issue, animals found to be infected with it should be 

 slaughtered as soon as the diagnosis is made. The differential 

 diagnosis from intestinal tuberculosis can be made by the tuberculin 

 test and by inoculation experiments upon guinea-pigs. 



QUESTIONS. 



1. What is meant by pseudotubercular diseases? 



2. Name the three types of bacilli which cause such pseudotubercular diseases. 



3. Are these bacilli acid-fast? What is the meaning of the term acid-fast 

 as applied to bacteria? 



4. What is the Bacillus pseudotuberculosis rodentium? 



5. Is it found as a saprophyte, and if so, where? 



6. What animals are susceptible to the natural infection by this bacillus? 

 By what route does it generally enter? What animals are susceptible to artificial 

 infection ? 



7. Describe the lesions produced by the Bacillus pseudotuberculosis rodentium 



8. Describe its morphology and staining properties. 



9. Describe its cultural properties. 



10. What is the Bacillus pseudotuberculosis murium? 



11. Describe its morphology and cultural properties and the lesions which it 

 produces. 



12. What kind of disease is ovine caseous lymphadenitis ? Where does it occur ? 



13. Describe the pathologic lesions of the disease. 



14. What causes the disease? Who discovered its specific microorganism? 



15. Describe its cultural characteristics. 



16. What animals are susceptible to the disease (a) under natural conditions; 

 (6) when inoculated artificially? 



17. What is the relation between the bacillus of Preisz (in ovine pseudo- 

 tuberculosis) and that of Nocard in lymphangitis ulcerosa equorum? 



18. What are the three acid-fast bacilli of Moeller? 



19. What effect have these bacilli when inoculated intraperitoneally into 

 guinea-pigs ? 



20. What are the Petri and the Rabinowitsch butter bacilli? 



21. Describe their growth on agar. 



22. Describe their effect in intraperitoneal inoculation into guinea-pigs. 



23. How can the characteristics of their growth on agar be changed so that 

 cultures resemble those of the tubercle bacillus? 



24. What is the smegma bacillus? 



25. How can the human lepra bacillus be distinguished from the human or 

 bovine tubercle bacilli? 



26. Is lepra in man and lepra in the rat identical? 



27. Describe the pathologic lesions in leprosy of rats. 



28. Describe the bacillus of rat leprosy. 



29. Can this disease be transmitted artificially, and to what animals? 



30. Where has rat leprosy been observed ? 



31. What kind of disease is chronic bacillary dysentery of cattle? By what 

 other name is it also known? 



32. Describe its bacillus and the pathologic lesions produced by it. 



33. Name four different diseases in animals due to different acid-fast bacilli. 

 How can you distinguish these four species by stains, cultural and inoculation 

 tests? 



