236 PRINCIPLES OP VETEEINAET SDRGEKT 



DISEASES OF THE MUCOUS BURSA. 

 Bursitis. 



What do you understand by bursitis ? 



Inflammation of a mucous bursa. 

 What forms of bursitis are recognized ? 



They are classified in the same way as diseases of the ten- 

 don sheaths or joints. 



Which bwrsitis is of practical interest ? 



Of the various bursse, that of the olecranon and os calcis, 

 either as an acute serous or acute purulent bursitis, are of 

 special and everyday interest to the practitioner. 



What other hursce, are quite often inflamed ? 



The navicular bursa, as in navicular hoof disease ; tha 

 trochanteric bursa, as in lameness due to inflammation of tha 

 tendon and tendon sheath of the middle gluteous muscle; also 

 the intertubercular bursa lodged in the bicipital groove of the 

 humerus for the benefit of the flexor brachi, which, when dis- 

 eased, gives rise to marked shoulder lameness. 



What are the causes of acute serous bv/rsitis ? 



Usually some external traumatism, as contusions, pres- 

 sure, blows, 



W hat is the most common cause of olecranian bursitis ? 



Capped elbow, as this condition is commonly termed, is. 

 frequently seen in horses, 'which, for some reason or other, liej 

 down a great deal (those afflicted with chronic lameness, as. 

 pododermatitis, navicular arthritis, etc.). In this instancee 

 the region of the olecranian bursa is bruised by the pressure 

 of the shoe. 



