American Veterinary Review, 
MAY, 1877. 
ORIGINAL ARTICLES. 
OSTEO POROSIS, 
By John Myers, V. S., of Cincinnati, Ohio. 
- (lOi - 
Osteo Porosis is the term of a disease which experience has 
proven to exist in solipeds of both sexes, and fall the victim thereof at 
their best period of life (from third to fifteenth year). It is character¬ 
ized by a partial enlargement “Hypertrophy” of either upper or lower 
jaw, very often both. It is extensively considered that this abnormal 
condition of the - head is a local affection and treated as such, or re¬ 
garded as incurable and left to nature. 
Etiology. There seems to be a difference of opinion as to its 
origin; however, climate and locality undoubtedly have a remarkable 
influence. The West and South-west of North America, and as I 
perceive, Canada are the districts especially favorable for its develop¬ 
ment, whilst in the East, it is but very little known. The damp and 
ill-ventilated stables are the principal generators of this disease. But 
very few cases have come under my observation, from the country, 
and with the exception of the summer following the Epizootic, only in 
the winter; for this reason I believe I may attribute the production of 
this disease to the moist and changeable atmosphere , in which the func¬ 
tions of the skin are manifold detrimentally affected; and moreover, 
when tracing the history of the case, it is generally found that the ani¬ 
mal was subjected to some recent unaccustomed exertion during which 
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