CONTAGIOUS PLEURO-PNEUMONlA. 
105 . 
, But the invasion of fresh tissue would probably have killed 
the animal before this could have taken place, it having already 
begun in the remaining lung, the evidence of which was seen in 
the deep staining of the tissue, the line of demarcation being very 
abrupt and well defined. The staining seemed to be due more to 
the coloring matter of the blood, than to the blood itself. 
Having disposed of these cases, we proceeded to the next 
farm, where five were treated in a similar manner, all presenting 
more or less, the obvious symptoms of the disease, and the post 
mortem showing the same characteristic lesions. I shall there¬ 
fore not describe them in detail. In one case where the tempera¬ 
ture was 106°, the visceral pleura was much disturbed with serum 
forming one large bleb. 
The onset of the disease, in the cases quoted, was obscure, 
and no definite cause could be traced. 
Since the outbreak of this disease, September 5th, ’83, in this 
state, 71 animals have died and 16 others are affected, and the 
prognosis for a speedy termination is unfavorable. The animals 
usually die of asphyxia. 
The blood, however, contains even during life a spherical 
bacterium, a micrococcous, as discovered by myself in my inves¬ 
tigation of this disease, in the pathological laboratory of the Uni¬ 
versity of Pennsylvania, and to which I shall refer later on. 
But before making the above statement, I wrote to Dr. A. Liautard, 
Prof, of Surgery and Anatomy in the American Veterinary 
College, asking if anyone had discovered or described this microbe, 
as I did not wish to claim anything that rightfully belonged to 
another. 
He writes as follows : 
New York, March 7, 1884. 
My Dear Doctor : 
I do not know yet, that it has been isolated and cultivated, as 
those of the other contagious diseases, such as anthrax, hog or 
chicken cholera. I regret that I cannot give you more positive 
information, but hope this may be of use to you. 
With best wishes, I remain, yours truly, 
A. Liautard. 
