H2 



I'ori.Tin' nisi:.\si:s and tiii:ik tkeatmkxt. 



given I ) prevent chickens from becoming infected witli other 

 ta])e vornis until the life lii^loiy of these ])arasites i> better 

 understood. It will be well, however, to keep the chickens 

 housed in the morning until the sun is well u]) and the ground 

 is (Ir_\-. for they will thus be less likely to meet with the sup- 

 ])Osable intermediate hosts of other worms." 



Round U'oriJis. 



Round worms can be found in the intestine and especially the 



ceca of almost any fowl. They are much more common than 



the tape worms. Normall}' the round W(_)rms cause no serious 



trouble to fowls. Under certain conditions, however, they may 



become so numerous as to 

 l)e a serious menace to the 

 dock. At such times they 

 have a decided effect on 

 the digestion ; the irrita- 

 tion often causes diarrhea. 

 A\dien in large numbers, 

 they sometimes become 

 rolled and matted into a 

 ball which may cause 

 complete stoppage of the 

 intestine. 



The round worms are 

 white in color and vary in 

 length from 1-3 inch to 5 

 inches. The head end is 

 sharp pointed, while the 

 tail end is more blunt. 

 Koimd worms are seldom 

 I)assed in the feces unless 

 present in very large num- 

 bers. When a wt)rm is 

 passed it soon dies in the 

 droppings or is eaten by 

 another fowl. 

 Dispharagus spiralis, a small worm about 1-3 inch in length, 

 is often found in the resophagus and occasionally in the crop or 

 intestine. 



Fig. 9. Worms protruding from a sec- 

 tion of the intestine of a fowl 

 L\ftcr Bradshaw). 



