672 Streptotrichosis of Dogs. 



ules as large as peas, which may be soft inside. In some cases 

 inflammation of the serous membranes is a sequence to external 

 local affection ; thus, for instance, a torpid, phlegmonous inflam- 

 mation or abscess of the extremities, in the subparotideal region 

 or neck, or a fistula in the vaginal wall or in the subperitoneal 

 connective tissue of the pelvis. These abscesses contain a 

 turbid, gray or reddish-brown, thick, muco-purulent substance, 

 which also contains the granules referred to. The inflammatory 

 process which occasionally develops as the result of an injury, 

 e. g., of the toes (Rabe) or side of the chest (Rivolta) gradually 

 progresses, attended Avitli only slight pain, and without produc- 

 ing conspicuous disturbance of function. After the abscesses 

 have discharged their contents and healing has occurred, new 

 abscesses will occasionally develop in other regions of the body, 

 or the pus in the old abscesses may burrow downward along the 

 course of the loose connective tissue. Inflammation of the lungs 

 and pleura may also develop very gradually, attended with only 

 a moderate elevation of temperature, until finally physical exam- 

 ination of the greatly emaciated animals reveals the accumula- 

 tion of exudate in the pleural cavity and consequent compres- 

 sion of the lungs. Inflammation of the peritoneum produces a 

 similar effect, the exudate distending the walls of the abdomen 

 to a greater or less extent. In other cases the presence and 

 exact nature of the exudate may be definitely determined by 

 aspirating the contents. 



At post-mortem examination other organs also (spleen, 

 liver, kidneys, heart muscle) may be found to contain firm or 

 softened nodules. Now and then pus accumulations occur in 

 some of the joints. 



Treatment. In some cases the surgical treatment of 

 primary nodes may bring about a complete recovery (Gohn). 

 As a rule, however, new nodules will develop cubcutaneously in 

 other regions of the body, and the emaciated animals finally suc- 

 cumb to the disease (aspiration of the pleural or peritoneal 

 exudate has in no instance proved effective). 



Literature. Rabe, B. t. W., 1888. 65. — Bahr, Z. f. Tm., 1904, VIII. 47 

 (Lit.). — TroUdenier, ibid., 1903. VII. 81. — Jochim, Diss. Bern, 1909 (Lit.). 



6. Botryomycosis. 



Botryomycosis is a chronic infectious disease of horses 

 which may, in exceptional instances, occur in cattle. It usually 

 results in the formation of local tumors resembling fibromata, 

 and occasionally in the formation of metastases in the internal 

 organs. It is caused by the Botryomyces equi. 



History. Bollinger was the first to observe the cause of the disease 

 in the nodules of a horse's tongue (1869) ; subsequently it was observed 



