QUESTIONS 425 



colonies on gelatin plates are milk white, on potatoes yellowish or 

 grayish white, and give off an odor of sour beer. The growth in 

 gelatin stick cultures shows the nail form; the medium is not liquefied. 

 The development on all these media occurs at room temperature, 

 more rapidly in the incubator. The organism on media containing 

 sugar assumes a yeast-cell type, while on media which contains no 

 sugar a mycelium is formed. If the organism is inoculated into the 

 crops of pigeons the typical thrush lesions are produced. If injected 

 intravenously into rabbits multiple metastatic foci of infection are 

 produced and the animals die. Young pigeons can be inoculated 

 in the mouth, where thrush lesions are formed. Older pigeons and 

 chickens are generally resistant. 



In artificial cultures Oidium albicans and other oidia often appear 

 as individual cells and multiply by budding; hence they are evidently 

 closely related to the budding fungi, or blastomycetes, discussed in 

 the next chapter. 



QUESTIONS. 



1. What is leeches or bursattee? In what countries encountered? 



2. What are the pathologic lesions of the disease? 



3. Describe the mould found in the pathologic changes. 



4. What is meant by pneumonomycosis ? In what animals does it occur and 

 under what conditions? 



5. What moulds cause pneumonomycosis? 



6. What is meant by dermato mycosis ? 



7. What mould causes herpes tonsurans? 



8. Describe the lesions in herpes tonsurans and the method of finding the 

 mould causing it. 



9. How does it look under the microscope? 



10. Describe pure cultures of Trichophyton tonsurans and the methods of 

 obtaining them. 



11. In what animal does the Microsporon Audouini cause skin disease? 



12. What are the lesions of favus? What organism causes this skin affection? 



13. Describe the favus mould. 



14. Describe its cultural properties. 



15. What lesions are caused by Achorion keratophagus ? 



16. What is Lopophyton gallinarum? Describe the lesions it produces. 



17. What is the Fusarium equinum? Describe the lesions it produces. 



18. What variety of spores does the organism form? What type is character- 

 istic for the genus fusarium? 



19. Describe the morphologic and cultural properties of the organism^ 



20. Where has Fusarium monilif orme been found ? 



21. What organism causes thrush? 



22. Where and in what animals is this affection found? 



23. What lesions does it produce? 



24. What is the other name for Oidium albicans? 



25. Describe its morphology. 



26. How will you look for it in the lesions of thrush? 



27. Describe the cultural properties of Oidium albicans. 



28. To what organisms is oidium related ? 



