PRINCIPLES OF VETERINARY SURGERY 129 



great variety of different points of the body, but shows a 

 special affinity for the lungs, skin, lymphatic glands and the 

 liver. Any part may however, become the seat of a glander 

 lesion. 



It is capable of producing the disease in the horse, ass, 

 mule, goat, dog, cat, hog, rabbit, cavy, field-mouse and in 

 man. The ox, white mice and rats are immune. The horse, 

 ass and mule are the most receptive of all the domestic 

 species. The dog and cat by inhabiting stables badly in- 

 fected with the disease, sometimes become inoculated with 

 the virus and develop typical cases. The hog is likewise 

 slig-htly susceptible but much less so than the other species. 

 Cattle never have the disease. The bacillus will not grow 

 in their serum, which Chenot claims will cure the disease in 

 experimentally-infected cavies. 



The lesions consist of nodules containing the bacillus, 

 leucocytes and some epithelioid cells. The nodules may 

 become necrotic, discharge their contents on the surface 

 and leave a ragged ulcer which may cicatrize rather slowly. 

 They may be numerous, few, acute or chronic. 



Avenue of Entrance. — The channel through which the 

 bacillus mallei enters the animal has a bearing on the clinical 

 phases of the resulting phenomena. When the admission is 

 through an abrasion of the skin the result may be a threat- 

 ening, phlegmonous swelling that soon suppurates at differ- 

 ent points; or a mere pustule, with the formation of second- 

 ary foci in remote regions. The neighboring lymphatics 

 are first to become involved, whence it diffuses to other 

 parts. The conjunctiva has been found to admit a fatal 

 infection, that first destroyed the globe of the eye. The 

 Schneiderian membrane, by direct inhalation of stable dust 

 containing the specified germ, is often the very first struc- 

 ture to become involved. Halter abrasions at the poll, collar 

 sores on the neck, saddle galls on the withers, often become 



