SECTION V. 



NERVOUS SYSTEM. 

 CEREBRAL CONGESTION. 



According to Cruzel, cerebral congestion is somewhat frequent in 

 working oxen subject to continued concussion from the yoke, esj^ecially 

 among animals working on a rocky soil. The condition may also be 

 produced by prolonged exposure to the sun, as well as by sudden and 

 intense cold. 



Passive cerebral congestion by stasis may be produced by any cause 

 markedly interfering with the return circulation (pericarditis due to 

 foreign bodies). Clinically it is of no importance. 



The animals, previously in good health, suddenly appear comatose. 

 They are insensible to stimulation of any kind, the head is rested on any 

 convenient object or is held stationary, the animal looks drowsy, the 

 gait is hesitating or vacillating, the resj^iration slow or irregular. Left 

 at liberty, the animal does not seem to know where it is going ; indeed, 

 sometimes it is absolutely blind and strikes against any obstacle in its 

 path, or falls and suffers from epileptiform convulsions. The cranial 

 region is abnormally warm. The course of the attack is rapid, and 

 the animal either dies in a state of coma or convulsions or else re- 

 covers rapidly. 



Diagnosis. The diagnosis is decidedly difficult; and the prognosis 

 should be reserved. 



Treatment commences with free bleeding, the amount of blood 

 drawn being proportioned to the animal's size. The sides of the body 

 may then be stimulated and a purgative administered. 



MENINGITIS. 



The generic term " meningitis " includes all inflammations of the 

 arachnoid, pia mater and internal surface of the dura mater. 



These forms of inflammation occur in diseases such as tuberculosis 

 and in parasitic diseases of the brain. Under other circumstances, they 

 are rare, and may be produced by very varying causes. 



An epizootic cerebro-spinal meningitis of the bovine species has 



