DISEASES OP SHEEP. IV 



the pus-like secretions which are produced there. In te: 

 months they reach their maturity, and drop out of th 

 nose or are thrown out by frequent snorting and sneezin 

 of the sheep. This occurs generally from March to Angus 

 and the larvse then undergo further changes on the outsid 

 of the sheep's body. If large numbers of these larvse ai 

 present in the cavities of the head, they produce in sprinj 

 when they are fully developed, various symptoms of diseasi 

 and even death. When the disease is of a mild characte: 

 the patients sneeze frequently, rub their heads against di 

 ferent objects, shake them violently, lift their noses higl 

 and remain in this position for some time or turn aside, an 

 there is a discharge of mucus from the nose. In a moi 

 violent form of the disease, the patient lets its head dro 

 down to the ground, walks about as if intoxicated, turr 

 around, becomes stupid and sad, and ceases to take fooc 

 These symptoms are often mistaken for vertigo. When tli 

 disease has reached its highest point, the animal loses flesl 

 falls down frequently, grinds its teeth, rolls its reddene 

 eyes, and finally dies on the fourth or eighth day. In mil 

 cases recovery takes place unaided : the larvse are throw 

 out by frequent sneezing, along with mucus ; and this is tl 

 only sure sign of the disease, at least for the non-professiona 

 Sometimes vertigo is present at the same time. 



If the head of a dead animal is opened, more or lei 

 larvsB are found in the above-mentioned cavities, which r 

 semble those found in the stomach of- horses. The muc\ 

 membrane of these cavities is inflamed, red, bluish, darl 

 red or ash-colored, and sometimes even gangrenous i 

 different points. Thirty and even forty of these larvse ha^ 

 been found together, but there is generally a much smalli 

 number present. 



To cure the malady, the larvse must be removed. F( 

 this purpose a little snuff or sneeze- wort ( Veratrum mhadilla 



