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The Basis of Symptoms; The Principles of Clinical Pathology (Paperback)
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The Basis of Symptoms; The Principles of Clinical Pathology (Paperback)
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for free. This is an OCR edition with typos. Excerpt from book:
CHAPTER III INFECTION AND IMMUNITY ( With the Collaboration of Dr.
E. Levy, Strassburg) In this chapter we purpose considering the
various means by which the animal body resists the invasion of
pathogenic microorganisms.1 The Portals of Entry.?How bacteria,
under ordinary conditions, gain entrance to the body is still not
definitely known. The body-surfaces are constantly beset by
innumerable microorganisms, among them the ordinary agents of
inflammation and suppuration: they are present on the skin, in the
nose and mouth, in the trachea and gastro-intestinal tract, and in
the vagina and urethra. Despite their intimate relation to the
major part of those surfaces which lie between the organs and the
outer world, they seldom gain access to the former; at least,
according to our present conception, morbid processes are initiated
with relative infrequency by bacteria which are normally present on
these surfaces. It is evident, therefore, that some protective
mechanism holds the organisms in check?this protective function,
without doubt, residing in the cells which constitute these
surfaces (see below); for the normal epithelium of the skin and of
the respiratory and digestive tracts is able, as a rule, to prevent
the invasion of micro-organisms. Solid particles other than
bacteria encounter an equal difficulty. In the case of mercurial
ointment, which seems to be an exception to this rule, soluble
fatty-acid salts2 are no doubt formed on the skin in a manner
analogous to the emulsification of fat before its absorption by the
intestines. In view of the fact that leucocytes can pass between
the epithelial cells, it is possible that they may carry back with
them bacteria which they have taken up on the body-surfaces. Were
this true, it would indeed be a marvellous proce...
General
Imprint: |
General Books LLC
|
Country of origin: |
United States |
Release date: |
2012 |
First published: |
2012 |
Authors: |
Ludolf Von Krehl
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Dimensions: |
246 x 189 x 12mm (L x W x T) |
Format: |
Paperback - Trade
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Pages: |
226 |
ISBN-13: |
978-0-217-37880-2 |
Categories: |
Books
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LSN: |
0-217-37880-3 |
Barcode: |
9780217378802 |
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