640 PRINCIPLES OF VETERINARY SURGERY 



by intravenous injections of cultures of micro-organisms 

 found in albuminous periostitis of man. The certain cause 

 of the disease is, however, unknown. 



SYMPTOMS. — The patient exhibits a special attitude. 

 The limbs are separated and more or less bent. The verte- 

 oral column is arched and the general aspect is that of ex- 

 treme suffering. The limbs present conspicuous, perma- 

 nent, deformities^ that reach, their maximum at the articu- 

 lar extremities. The articulations are surrounded by osse- 

 otis formations which make them large and thick. The. 

 tibio-patellar articulation, the tar&us and the carpus are en- 

 larged, irregular and enormous. The aflfected area can be 

 easily located by palpation. The surface is hot, but not sen- 

 sitive. If followed for several months it will be observed to 

 have a slow evolution and an insidious, encroaching mode 

 of progress. It does not seem to shorten life, but make the 

 animal useless. 



PATHOLOGICAL ANATOMY.— The macroscopic 

 lesions are located in the osseous system. At the autopsy, 

 the remaining organs seem free from lesions. The skeleton 

 is not all affected. The bones of the limbs are chiefly at- 

 tacked, but the other parts of the skeleton may also exhibit 

 lesions of osteitis. Lienaux found the vertebrae and the ribs 

 affected. The alterations in the limbs increase progressive- 

 ly and transgress toward the lower part of the extremities. 

 The pelvis and scapulae show no alterations. The femur 

 and the humerus have exostoses which trail unevenly to 

 connect with the lesions below. The tibia and radius, are 

 entirely invaded by exostoses which greatly increase the 

 thickness of the two extremities. The carpus, tarsus, first 

 metacarpals, and first metatarsals are drowned in a veri- 

 table osseous gangue of new formation. (Fig. 104 and Fig. 



105). 



Generally speaking the longitudinal dimensions of the 



