156 VETERINAEY STATE BOARD 



cornea have an aborescent appearance. Back of the cornea and in 

 the lower part of the anterior part of the eye is a fibrinopurulent 

 exudate. The iris is swollen and adherent to the lens or cornea, 

 constituting synechia. There is swelling and tenderness of the 

 outer rim of the cornea (cyclitis). Infiltration of the lens with 

 lymph renders it opaque. Exudates beneath the retina detach it 

 from the choroid. The whole condition is often spoken of as 

 ' ' iridocyclochoroiditis. ' ' 



Skin 

 Give the pathology of acne. 



Acne is an inflammation of the sebaceous glands and hair fol- 

 licles. It appears as small nodules varying in size from a millet 

 ?eed to a pea. These nodules may contain serum or pus and the 

 hair covering them falls out. Scabs may cover the nodules which 

 upon being removed leave a raw ulcerating spot beneath. Chronic 

 indurative dermatitis often follows or accompanies this condition. 



What is dandruff? 



Dandruff is an exudation product, seen as small bran-like scales, 

 occurring in superficial inflammation of the skin with an excessive 

 sebaceous secretion. 



Name the stages of eczema. 



Erythematous, papular, vesicular, moist, pustular and scaly. 



Name the pathologic conditions that may affect the equine foot. 



Pododermatitis, including corns and canker, navicular bursitis, 

 fracture of the navicular bone, ossification of the lateral cartilage 

 (side-bone), necrosis of the lateral cartilage (quittor), laminitis, 

 inflammation of the ligaments of the coronet joint, ringbone, etc. 



Give the pathology of acute and chronic laminitis. 



Acute: Hyperemia of the sensitive laminae; exudation, loosen- 

 ing the hoof from the matrix ; the exudate may consist of serum, or 

 serum and pus. The sole may be "dropped" owing to descent of 

 the OS pedis. Separation of the hoof from the coronary band may 

 occur and allow the exudate to escape. 



Chronic: The hoof wall shows a number of concentric rings, 

 producing irregularities of same; the sole is "dropped" and the os 

 pedis displaced downward ; the coronet joint shows abnormal dorsal 

 flexion. The white line is greatly thickened and a thin purulent 

 exudate covers its surface. The laminae are not as hyperamic as in 

 the acute form. 



