70 



POULTRY DISEASES 



bird of tapeworms.. This should be followed by 

 a heaping teaspoonful of epsom salt or a table- 

 spoonful of olive oil. Powdered areca nut is also 

 effective. Thymol in one grain doses is said to rid 

 the digestive tract of worms. 



Davainea Tetragona 



This is the parasite that causes nodular tsenia- 

 sis (nodular tapeworm disease). It has been 

 observed and reported as occurring in some of the 



eastern states and caus- 

 ing quite a loss to poul- 

 try raisers. 



Fig. 25 illustrates the 

 nodules as they are 

 found and about natur- 

 al in size. This is from 

 a drawing of the outer 

 (serous) surface of an 

 intestine, which pre- 

 sents a nodular appear- 

 ance that might be mis- 

 taken for tuberculosis. 

 The mucous (inner) surface of the intestine is 

 similarly elevated, and protruding from the 

 nodule into the itnestine may be seen a portion 

 of some of the worm. In later stages these 

 nodules may show ulcerations on the mucous 

 surface. There may be seen in these nodules a 

 greenish-yellow necrotic material. A secondary 

 invasion, with pus germs, may take place, in which 

 case pus will be present. Before the nodules are 

 formed these worms may be seen between the villi. 

 The occurrence of this tapeworm in the intes- 

 tine is similar to the tapeworm described above 

 (Tccnia infundibuliformis). 



Fig. 25. Nodular Tjeniasis 

 (tapeworm disease) 

 A, Section of intestine of chicken 

 (natural size). B, nodules (nat- 

 ural size). 



