708 
H. H. DELL. 
Tail. —Extremity presented small, sloughy aperture, with¬ 
out macroscopic evidence of thrombi. 
The articulations showed no traces of abscess formation. 
Microscopic examination of organs stained with methylene 
blue revealed the following results: 
In the spleen numerous large haemorrhages and very min¬ 
ute abscesses, and throughout small collections of cocci 
(apparently staphylococcus pyogenes), evidently of embolic 
origin. 
Kidneys showed a similar condition and also advanced 
parenchymatous degeneration. 
In the liver were haemorrhages, old and recent, and areas 
of necrosis. Cells in the centre of the lobule showed early 
atrophy. No true abscesses were apparent, but cocci were 
present in arteries and veins, and invading the bile ducts. 
The heart muscle showed cocci in the capillaries but no 
abscess formation. 
Tail. —A section from the site of the wound showed con¬ 
siderable necrosis, small cell infiltration, together with gran¬ 
ulation tissue. The veins themselves, so far as could be made 
out, did not show on being stained with methylene blue any 
trace of bacteria in their lumen. Loose thrombi, and some 
partially organized, are seen in the vessels, but further exam¬ 
ination was rendered unsatisfactory owing to conditions under 
the tail, which had been preserved. 
Conclusions and Pathological Diagnosis. —Death from pyeemia 
following the operation on the tail. Thrombo-phl£bitis in 
the vessels. Acute ulcerative aortic endocarditis with metas¬ 
tatic abscesses in the kidney and spleen, parenchymatous 
nephritis, necrosis in the liver. 
Interesting Features. —It is interesting to notice the vir¬ 
ulence of the disease following so simple and trivial an oper¬ 
ation. Further, the very few clinical symptoms are also not 
what would be expected in a disease making such rapid 
advances; while again, the freedom of the lungs and artic¬ 
ulations from abscesses is one particular wherein the disease 
in this case did not follow the usual course as seen in other 
animals. 
