GCA 



Gid. 



Uie (Miibryos, and tlio second is indicated l)y symptoms due to 

 pressure on the brain. 



During tlie tirst stage wliicli sets in ten to fourteen days 

 after infection there are symptoms of a general nature indicat- 

 ing inflammation of the brain and its membranes. As a rule, 

 these symptoms are so slight that they escape the notice of the 

 shepherd ; it is iu a proportion of cases only, according to Mol- 

 ler about one-tifth, that the symptoms are sufficiently pronouuced 

 to be observed. The diseased sheep are left behind by the 

 flock, m.ove as if giddy, cease feeding and stand with heads 

 droyjped, and vacant expression. In some cases, but not very 

 often, the animals make forced movements. 



In somewhat more severe cases, the symptoms of inflam- 

 mation are more pronounced. The head is hot and painful, the 



¥i<^. 9:2. Brain of a sheep with Ccenurus eerebralis. (1) Cyst in the left hemi- 

 sphere. {'1\ lliglit liomisphere forced to tlie right by the left hemispliere. (3) 

 I'osition of ])erforation (5) in the frontal bone. (4) flattened convolutions of the 

 loft hemisphere. 



vessels of the conjunctiva are dilated, the expression wild, and 

 in some cases there is obliquity of vision. There is acceleration 

 of the pulse, the neck is twisted to one side, owing to muscular 

 spasms, and in some cases, there is a full flow of saliva and 

 grinding of the teeth. Many animals jump up suddenly, rush 

 about, stumble, and fall down, showing spasms of certain groups 

 of muscles or of the whole body. In a proportion of cases (5 

 per cent, Moller) the diseased animals are absolutely unabh' 

 to rise. In such cases, death usually takes place from four to 

 six days after the appearance of the first symptom. In other 

 cases, the acute stage varies in duration, according to the sever- 



