68 DISEASES OF SHEEP. 



quently vertigo itself, winch may be avoided or prevented 

 by a careful prevention of such injurious causes and influ- 

 ences. It is therefore advisable to keep the lambs during 

 midsummer in cool and airy stables, to feed them with 

 good green fodder, and furnish them from time to time with 

 a lick of saltpetre, glauber salts and rock salt. In case of 

 inflammation of the brain, large portions of salt must be 

 given ; the animal must be bled, taking about half a pint 

 of blood ; a seton may also be applied upon the neck. 



In case of vertigo in its developed state, and when the 

 worm-bladder is fully formed, there is no use in a general 

 or local treatment of the disease, except the emptying of 

 the bladder by means of a mechanical operation. This 

 may be done by an incision with a small trocar or sharp- 

 pointed instrument, when the incised spot must be turned 

 in such a direction that the water may flow from the blad- 

 der. Such an operation produces sometimes an effectual 

 cure, but often results in the death of the animal, by pro- 

 ducing suppuration of the brain. Sometimes the bladder 

 may be removed through the opening by means of pincers 

 or a pin : if this is impossible, the skin of the bladder may 

 remain upon the brain without any apparent harm. All 

 other kinds of operations are without effect, except perhaps 

 the burning of the bladder by means of a heated iron, 

 which, however, is of no better effect than the before-men- 

 tioned operations. Other exterior remedies are without 

 avail, even the application of muriatic acetate of zinc, 

 which was formerly a great favorite with practitioners. In 

 most cases it is advisable to kill the diseased animal before 

 the same is exhausted from sickness, the flesh of such ani- 

 mal being then as good as that of a healthy one. 



