223 DISEASES DUE TO INTEENAL PARASITES. 



kept. It is frequently complicated with verminous bronchitis, 

 and is generally prevalent during the spring and summer 

 months.. JSTo portions of the United States appear to be free 

 from its ravages. Throughout Arizona, New Mexico and 

 Mexico proper, it is known under the name of lombriz, a deriva- 

 tion from the Spanish "lombrici," meaning worms; its attacks 

 being of frequent occurrence in those districts. 



Hppearance of Qlorms. 



Body red or white according as its intestine is full of blood 

 sucked from the mucous membrane of the stomach, the extremi- 

 ties are pointed, just behind its anterior extremity two small 

 lateral projections (papillae) are noticeable. These are shaped 

 in the form of teeth, projecting backward. Fine lines or striae 

 mark its integument (skin) transversely, in addition to which 

 are longitudinal ridges forty or fifty in number. The male 

 worm is from one-half to one inch in length, the female from 

 one to one and one-half inches, its body terminating in a pointed 

 tail. Its vulva is situated a short distance from the tail in a de- 

 pression covered by a powerful tongue-like appendage, which 

 points backward; its eggs are ovoid and infinitesimally small in 

 size. 



The probable source of infection of sheep by these pests is 

 through the medium of the water supply. Leukart reports that 

 he has seen them grow rapidly in muddy water, reaching such 

 a state of growth as to be able to mature after gaining access to 

 ruminants. Such. being the case, it is necessary to guard against 

 the water supply being contaminated with the excrements of 

 animals which are themselves suffering from these worms. 



Symptonid. 



These so far as being characteristic of this particular order 

 of worms are not well marked. The afFected animal is dull,. 



