INFECTIOUS SWINE DISEASES IN THE UNITED STATES. 
813 
ORIGINAL ARTICLES. 
REMARKS ON THE NATURE AND THE DIFFEREN¬ 
TIATION OF THE INFECTIOUS SWINE DIS¬ 
EASES IN THE UNITED STATES.* 
By Veranus a. Moore, B.S., M.D. 
Professor of Comparative Pathology and Bacteriology. New York State Veterinary 
College, Cornell University, Ithaca, N. Y. 
We soinetiines hear that there is imich confusion concern¬ 
ing the knowledge of the infectious swine diseases in the United 
States. Perhaps for a brief time early in the history of their in¬ 
vestigation, this was the case, but at present our pathologists 
are, with possibly a very few exceptions, agreed on their morbid 
anatomy and etiology. There appears, however, to be an ele¬ 
ment of uncertainty concerning them entertained by a few 
writers, more especially among those who have not had an op¬ 
portunity of studying them as they exist in epizootic form. 
The fact must be admitted, therefore, that while these diseases 
have been clearly defined in the official reports of the Bureau of 
I Animal Industry, U. S. Department of Agriculture, and by 
I pathologists and bacteriologists in other institutions, there have 
‘ appeared, both at home and abroad, statements of a contradictory 
I nature which have tended to confuse the reader of the recent 
I literature upon this subject. The difficulty, however, is in the 
; interpretation rather than in the lack of the existence of defi- 
j nite knowledge concerning the nature and cause of these mala- 
i dies. Although our knowledge of their natural history is far 
I from being complete, no one familiar with the facts, as they are 
I recorded, can feel that American swine diseases have not been 
I carefully investigated. 
As the advance in human medicine depends so largely upon 
the results of comparative and experimental pathology, it is 
j "^Read before the Section of Pathology and Bacteriology of the British Medical Asso¬ 
ciation at the Montreal meeting, Sept., 1897. 
