59 



iiilcriiii'dialr lutsl, as :i worm, hcr.iic ii can (l,"'vi'l(i|, 

 iiUo a luaiuie paitisitc in tiie bod.v ol ilie fowl. The 

 symptoms occasic'iied by these parasites are similar to 

 those produced by tapeworms bnt are of a less violent 

 and serious character. 



The remedies and means of picvenlion are prac- 

 tically' the same. 



ROUND WORMS— NEMATODES. 



The round worms are cloniiated and usually quite 

 slender parasites, mowtly of a whilish color and are 

 provided willi a moulli and di^jcslive canal. When 

 present at all they arc a])t to exist in ronsiderable num- 

 bers, and sometimes occur in vast quantities. There 

 is one form of round worms kno\\n as Trichosoma con- 

 tortum, a little whili- w<Min from one-half to three- 

 fourths of an inch loiii;-. that has been found beneath 

 the mucous membiane lining- the oesophagus and crop. 

 Sometimes as many as thirty of these worms bave been 

 found in the oesophagus in a single bird. They inter- 

 fea-e seriously with the i)assage of food through this 

 tube, affect the digestion and appetite and cause wast- 

 ing and ■weakness. At length, the oesophagus be- 

 comes engorged with food, it cannot contract or pass 

 its contents along and the animal dies within a few 

 days. 



Some species of i-ound worms collect in the intestine 

 in great nun'bers, in fact, as many as five hundred have 

 been removed from the body of a single fowl. By their 

 presence they occasion a good deal of irritation of the 

 digestive tract,intrefere with nutrition, cause diarihoea 

 and weaki ess and death. Sometimes the disease 

 caused by these j»arasites follows a long course and 



