GANGRENE OF THE SPLEEN IN SWINE.

Hertzen records the case of a pig in which the spleen had become gangrenous and lay free in a surrounding fibrous capsule.

TUBERCLES AND GLANDERS NODULES OF THE SPLEEN.

Tubercles in the spleen are common in cattle, swine, guinea-pigs, rabbits and cats, in the last largely as the result of ingestion of tuberculous meat. In the larger mammals individual tubercles are usually of the size of a walnut and upward, while in the smaller they show as miliary deposits. The products are often caseated or calcified.

Glander nodules are found in the spleen of the horse and other solipeds and as the result of inoculation in that of rabbits and guinea-pigs. In solipeds they may be of considerable size whereas in the inoculated rodents they are usually small and numerous—like millet seed or pins’ heads.

PARASITES OF THE SPLEEN.

Parasites are less common in the spleen than might be expected yet the encysted parasites of the liver and pancreas, are also to be found in the spleen. Thus echinococcus is found in the spleen of cattle, and headless hydatids in that of the horse; cysticercus tenuicollis in the spleen of sheep; cysticercus cellulosa in that of pigs; distomata, and pentastoma denticulata in the spleen of cattle; coccidia in the spleen of rabbits; and actinomyces in that of horses and cattle.

In addition to these the spleen is a general rendezvous for the different pathogenic organisms that can survive in the blood stream, such as the bacilli of tubercle, glanders, septicæmia, anthrax, black quarter, swine plague and hog cholera, and for the cocci of suppuration, strangles, contagious pneumonia, etc. (See Parasites and Contagious Diseases).

INDEX.