INFECTIOUS OPHTHALMIA OF CATTLE. 
707 
The need in the profession to-day is a closer application to 
sanitary principles governing the treatment of diseases, as well 
as the prevention of disease. Preventing disease based upon its 
pathology. The influences of inheritance. The transmission of 
functional peculiarity associated with this inheritance of soil 
and the transmission from parent to offspring of certain con¬ 
ditions, apparently pertaining to the tissues and predisposing to 
disease, is a question for concern as vital as the treatment of 
disease when precipitated. We can no longer cast aside the 
necessity of the hour. We are in the field of activitv, we must 
perform. It becomes us therefore to do our part well, take on 
the harness of rich opportunity, toil for the benefit of our race, 
and at the end of labor reap reward. 
INFECTIOUS OPHTHALMIA OF CATTLE. 
By W. F. Weese, V.S., Ottawa, III. 
A Paper read before the Illinois State Vet. Medical Association. 
The geographical distribution of this affection, which I have 
taken the liberty of calling “ Infectious Ophthalmia,” is difficult 
to determine owing to the absence of literature on the subject 
and published observations by practitioners. That it prevails in 
the Western and Southwestern States is evidenced by shipments 
of cattle to this locality, u feedeis ” frequently being affected on 
arrival or manifesting the disease a few days subsequently. The 
assertion that our native cattle only become affected through 
shipments of cattle from the Westfis not borne out by observa¬ 
tions, the writer having seen the disease develop among dairy 
herds under circumstances not warranting that conclusion. 
It prevails for the most part during the months of July and 
August, cool weather and frosts causing an abatement of its in¬ 
fectiousness and a suspension of the active pathological changes 
in those cattle already suffering from the malady. The etiologi¬ 
cal factor in its production exerts itself in different degrees of 
severity, not only in one herd, but in different outbreaks, and its 
infectiousness differs in transmissibility as much as the patho¬ 
logical alternations. 
