QUESTIONS 415 



QUESTIONS. 



1. What is the technical name for lumpy jaw in cattle? What organism 

 causes it? 



2. For what pathologic process was the disease formerly generally mistaken, 

 and why? 



3. Who were the investigators who first saw the ray fungus? Who first recog- 

 nized its significance? 



4. Where does the ray fungus exist in the outside world? 



5. To what changes does it lead after invading the tissues of susceptible 

 animals? 



6. Describe the actinomycotic tongue affections in cattle. Why called under 

 some circumstances the wooden tongue? 



7. Describe the spread of the disease in the maxillary bones; also the final 

 appearance of an advanced case. 



8. What is an osteoplastic inflammation? 



9. What is meant by necrosis of the bone? 



10. Which internal organ in cattle is frequently the seat of actinomycotic 

 lesions in advanced cases? 



11. What animals besides cattle are susceptible to actinomycosis? 



12. What lesions does actinomycosis produce in man? 



13. Discuss the systematic classification of the ray fungus. 



14. Describe the process for the microscopic examination of actinomycotic 

 granulation tissue or pus. 



15. Describe the ray fungus as generally seen in pus. 



16. Describe some methods of staining the ray fungus in celloidin sections. 



17. Describe the finer details of an actinomyces granule as it can be studied in 

 a section. 



18. What are the clubs of the ray fungus which form the rosette? 



19. How is a first culture from actinomycotic material obtained? 



20. Describe the cultural properties of the ray fungus. 



21. Describe the appearance of the ray fungus in a stained cover-glass prepar- 

 ation obtained from a pure culture. 



22. Discuss the resistance of the ray fungus. 



23. What animals are very susceptible to artificial ray fungus inoculation? 



24. How is actinomycosis generally contracted by cattle, horses, hogs? 



25. How is it generally transferred from cattle to man? 



26. How can the presence of actinomycosis on grasses be sometimes demon- 

 strated? 



27. How does the ray fungus spread after it has once penetrated into the 

 tissues? 



