PARiVSITIC DISEASES 



17s 



Description. — The whip worm is about one and a 

 half inches long. The anterior two-thirds of the body 

 is very thin and hair-like, and the posterior third is 

 suddenly expanded, thick and cylindrical in shape. 

 It is because of its resembling a whip in shape that 

 it is popularly known as whip worm. The male is 



FIG. 22 — WHIP WORMS ATTACHED TO WALL OF INTESTINE 



smaller than 'the female, but the difference in size 

 is not as noticea:ble as in other forms. The male 

 can be easily recognized by its coiled oaudal ex- 

 tremity. 



Source of Infection. — Infection occurs in the 

 usuail manner. The ova, or eggs, become scattered 

 about the pens and pastures, and are taken into the 



