90 



PARASITOLOGY. 



hemorrhage, pneumonia, etc., causing unthrifty con- 

 dition, loss of appetite, emaciation, anemia and 

 death. 



FILARIDAE. 



The family Filaridae includes thread-like worms 

 that infest various parts of the body, as the esopha- 

 gus, stomach, vascular system aud abdominal cavity. 

 They are not blood-suckers. 



Spiroptera Scutatum 



.S^. 



(Scutem — shield) 

 (Speira — spiral) 

 (Pteron — wing). 

 Synonym. — Gongylonema scuta- 

 tum. 



Distribution. — Common in Amer- 

 ica and Europe. 



Description. — A thread-like worm, 

 yellowish in color and two to four 

 inches in length. The tail of the 

 male is coiled, and is provided with 

 two wings and two spiculae. The 

 tail of the female is straight and the 

 head is nude. It is ovo viviparous. 



Animals Infested. — The horse, the 

 ox, the sheep and the pig. 



Parts hiksted. — They are found 

 coiled in a zig-zag manner in the 

 mucous membrane of the esopha- 

 gus. 



Inj2iry to Host. — No injury has been attributed to 

 their presence. 



Spiroptera Megastoma (Mega — large; stoma— mouth). 

 Distribution. — Common in America and in Europe. 

 Description. — A thread-like worm, white in color 



Fig. 30.— Spiroptera 



SCUTATA. 



a, Esophageal Mucous 



Membrane. 



b, Worm imbedded in 



spiral manner. 



