332 BOVINE PATHOLOGY. 



inclement seasons, and is not usually found associated with 

 the introduction of a fresh lot of beasts on to a farm, nor 

 with exposure in fairs and markets. 



Symjotoms. — Acute febrile signs are present, the attack 

 is sudden, runs its course rapidly, and frequently termi- 

 nates in resolution. We seldom find one lung more 

 affected than the other, and the phases of the disease in 

 the different parts of the lung are uniform. 



Post-mortem ajppearances show the lung disease as 

 rather of the catarrhal than the croupous form. Both 

 lungs are generally uniformly involved. The section 

 presents a marked appearance, but not the variety of 

 colour seen in the other form — the yellow bands are not 

 so evident. With the exception of the intercostals the 

 muscular system presents no special change. 



The diaphragm of the ox is very upright. The 

 muscular fibres gain attachment in a bipenniform manner 

 to a tendon running from above downwards centrally, 

 to just above foramen sinistrum. This arrangement is 

 very special. 



EuPTURE OF THE DiAPHRAGM is somotimos scou in the ox ; 

 it is generally complicated with hernia. In some cases 

 it seems to be rather congenital deficiency than true 

 rupture. 



