Exercise 40 (Continued) 



previously been prepared for examination in the same manner. Observe 

 carefully any evidences of abnormality or disease. 



Peritoneum Proventriculus Testicles or ovaries 



Crop Gizzard Oviduct 



Esophagus Intestines Heart 



Liver Caeca Lungs 



Gall bladder Pancreas 



Spleen Kidneys 



Step 5. — From diagnosis state probable disease and possible cause. 

 Step 6. — If time permits, the structure of each organ can be examined 

 microscopically and the appearance of healthy tissue determined. Possibly, 

 bacterial growth can also be isolated and studied. 



Leading Questions. — 1. Name evidences of health and vigor in a normal 

 bird. 



2. Name possible evidences of sickness in a live bird. 



3. What are the relative advantages of an ante-mortem and a post- 

 mortem diagnosis? 



4. Why is chloroforming a better way of killing a bird for post-mortem 

 work then by breaking the spinal column near its junction with the head? 



5. Describe the normal appearance of the following organs: Liver, 

 caeca, lungs, ovary, gall bladder. 



6. What are the most common causes of death in poultry? 



7. Classify the common diseases on the basis of the organs attacked. 



8. Classify poultry diseases on the basis of their mode of infection. 



9. What do you consider to be the relation, if any, between chicken pox, 

 roup, and canker? 



10. To what extent are ovarian disorders in hens responsible for deaths? 



132 



