GENERAL DISEASES. 61 



of the lung, and are subject to fatty, caseous, and calcareous 

 change. On section they are of a translucent pearly-grey 

 colour, surrounded by a zone of inflamed tissue. In struc- 

 ture they are identical with those found in the nasal cavity ; 

 but the latter, not being imbedded deeply in tissue, more 

 readily ulcerate and discharge. 



There remain for consideration two forms of morbid change, 

 which, though important, are not frequently met with, viz. : 



1. Tumours, or Abscesses. — These are generally found on 

 the more exposed parts of the body: the scapular region, sides, 

 and haunches. They are quite distinct from the nodules 

 above described, and are larger, more defined, and less jirone 

 to ulcerate. They bear a greater resemblance to ordinary 

 cysts or abscesses than to the specific lesions of equinia ; but 

 in the contained fluid, in disposition to fill when emptied, 

 and in the slowness of healing, they agree with the latter. 



2. Diffuse Infiltrations. — These infiltrations are usually 

 situated in the limbs in the neighbourhood of the joints, and 

 usually accompany the pseudo-rheumatic symptoms. They 

 exhibit a tendency to rapid change of situation, appearing in 

 connection with some other joint, and in this they resemble 

 the rheumatic inflammations. 



Diagnosis. — The diagnosis of equinia is usually not at- 

 tended with difiiculty ; but in some cases, especially in those 

 of pulmonary glanders, it is not always easy to arrive at a 

 definite conclusion. 



Glanders is now of far less frequent occurrence in this 

 country than it formerly was, and this is largely due to the 

 adoption of measures based upon its undoubtedly infectious 

 character, and the management of horses in accordance with 

 this idea. 



Treatment. — Animals aff'ected with the various forms of 

 equinia are, in the interests of the community, destroyed, in 

 order to prevent further spread. The rules of the Conta- 



