Volume 1

Text book of veterinary medicine / by James Law.

  • James Law
Date:
1896-1903
Catalogue details

Licence: Public Domain Mark

Credit: Text book of veterinary medicine / by James Law. Source: Wellcome Collection.

    12/428 page 2
    Special Pathology on the contrary is confined to a particular disease and not only elucidates the causes, phenomena and results of such disease, but seeks to do this in such a way as to differentiate this malady from all others however closely related to it. Thus inflammation of a bone is known under the general name of osteitis, this may be due to a great variety of different causes, and each would have its own special pathology. The osteitis of simple mechanical injury is essentially different from the osteitis of rheumatism, of purulent infection, of tuberculosis, of actino- mycosis. So with the inflammations of every other tissue. Each may suffer from a variety of inflammations, springing from dif- ferent causes, attended with characteristically unlike tissue changes and tending to different issues, and every one of these forms has therefore its own special pathology. General Pathology may be said to deal with typical disease processes to a large extent irrespective of the individual disease in which they may appear, while Special Pathology deals with the morbid phenomena which distinguishes the individual malady from all other diseases however closely allied to it. Pathological (Morbid) Anatomy deals with structural changes, the cause, the accompaniment or result of disease. These morbid changes are microscopic or macroscopic. Both con- stitute morbid anatomy, but the microscopic alterations come under the special name of morbid (pathological) histology. Pathological Chemistry is that branch of pathology which treats of chemical changes produced by disease in the blood, lymph, tissues, secretions and excretions. It demands a previous knowledge of the condition of these tissues and fluids in health, in the particular genus of animal and under the same dietary and environment. Physiological Chemistry is therefore an essential prerequisite to pathological chemistry, just as anatomy, physi- ology and histology are indispensable to the appreciation of path- ology and morbid anatomy. Disease is an injurious deviation from the normal function or structure. The morbid process resulting in disease is usually in the nature of a modification of the normal or physiogical condi- tion, so that it is often difficult to set the exact limits of health and disease. What is a purely physiological process under given conditions, would be distinctly pathological under others. The
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