WATERY BRAIN CYSTS. 



309 



sures immunity from attack. Setons produce a condition 

 of the body less favorable to development of micro-organ- 

 isms. Careful dietary. Kemoval from exposed, undrained, 

 infected grazings. 



Compare above article with pages 225, 226. 



STURDY, GID, TURNSICK, 



Also known as turnside, goggles, vertigo, &c, is due to 

 a bladder worm in the brain. It is called sturdy because 

 the animal is stupid. A synonymous term in Norfolk, 

 England, is ' dunt/ If the sheep turns to one side or 

 round and round, it is known as turnsick, gid, &c, while, 

 owing to peculiarities of gait, sheep are said to be sailors, 

 trotters, or swervers. The disease is peculiar to cattle 

 also. 



Fig. 146. Brain of sheep, showing hyda- 

 tids or tapeworm cysts. 



Fig 14?. Cyst, showing em- 

 bryo worms in various 

 stages development. 



The bladder worm or hydatid is the immature form of 

 one of the tapeworms of the dog; possibly also the fox. 

 It is known as the many-headed hydatid. Sheep become 

 the victims of it by swallowing the eggs of the tapeworm 

 while grazing. The embryo finds its way to the brain 

 either by the circulation or by boring, and sometimes it 

 gains access to the spinal cord, in the neck, and causes 

 the condition known as thorter-ill. 



