STREPTOCOCCI IN COMPARATIVE PATHOLOGY. 
779 
not be mistaken for the genuine foot-rot with which it seems to 
be occasionally confused. It is not unlikely that in certain 
cases of this disease there may be more or less secondary corrod¬ 
ing of the hoof. 
Klein ^describes a streptococcus which he isolated from 
sheep suffering from foot-and-mouth disease. He was able to 
produce the lesions by feeding sheep with pure cultures. Sub¬ 
sequent investigations have not confirmed Klein’s results con¬ 
cerning the causation of this disease. However, his observa¬ 
tions are significant in showing the susceptibility of sheep to 
these organisms. 
streptococci in diseases of horses. 
The horse stands, perhaps, foremost among the domesticated 
animals in its susceptibility to bacterial infection. A number 
of microorganisms have been found associated with the lesions 
in a variety of its maladies, but those which seem to produce 
the larger number of affections are streptococci and certain mi¬ 
crococci belonging to the staphylococcus group. In this paper 
the streptococci only will be considered although a number of 
micrococci have been isolated which unquestionably possess a 
certain amount of pathogenesis for the horse. The points to 
which I desire to call special attention are the frequency with 
which streptococci are associated in suppurating lesions and 
septic infections and their superior power to invade and to sur¬ 
vive in the tissues of this animal. 
Streptococci in “ Fistulous Withers ” and u Poll-EvilS f—At 
the last meeting of this society I reported the results of the 
bacteriologic examination of four cases of these affections. 
In all of these, streptococci were the only bacteria isolated or 
* The Veterinarian , 1 886. p. 92. 
-f- It should be stated, however, that it is only within the last year that we have been 
able to begin a somewhat systematic bacteriologic examination of the suppurating lesions 
in the cases brought to the surgical clinic of this college. Through the hearty co-opera¬ 
tion of Dr. W. L. Williams, Professor of Surgery, preparations have been made for an 
extended bacteriologic study in the future of all infected surgical cases. This part of 
my paper, therefore, is simply an introduction to the work in veterinary surgical bacteri¬ 
ology which is planned tor the coming season. 
