This historic book may have numerous typos and missing text.
Purchasers can download a free scanned copy of the original book
(without typos) from the publisher. Not indexed. Not illustrated.
1905 Excerpt: ...progress in the study of the phenomena of immunity
has been a method for the clinical diagnosis of typhoid fever and
certain other diseases. It Fig. 46.--Diphtheria Bacilli (methylene
Blue). (After Wesbrook.) Diagrammatic. has been shown that when the
animal body is invaded by a parasitic micro-organism, the cells
produce in some cases antitoxins which neutralize the poisons of
the microbe, and in other cases anti-bodies of another type which
have a specific destructive action on the parasite itself.
Sometimes the defensive secretions dissolve the foreign cells;
sometimes they cause them to clump together in masses and to settle
out of the fluid in which they are suspended. In the blood of an
individual infected with typhoid fever, bodies of the last type,
known as agglutinins, are present; and their clumping reaction is
specific for that particular micro-organism. It is true that the
blood of a normal individual may contain substances which
agglutinate typhoid bacilli, but that of a typhoid patient has the
power to such a high degree that it will produce the same effect
much more rapidly and in high dilution. In making the diagnosis of
a suspected typhoid case, a sample of blood is taken from the lobe
of the ear in the usual manner and allowed to clot in a small
testtube so that the corpuscles are separated from the clear
straw-colored serum. A drop of serum is then mixed on a slide with
40 drops cf a fresh broth culture of the typhoid bacillus. The
mixture is covered and examined under the TVmcn oil-immersion
objective. At first the bacilli may be seen, after careful
focussing, as minute transparent rods, singly, or in pairs and
short chains, moving rapidly about across the field of the
microscope. If agglutinins be present, the bacteria become
|Country of origin:
Charles-Edward Amory Winslow
||246 x 189 x 3mm (L x W x T)
||Paperback - Trade
Is the information for this product incomplete, wrong or inappropriate?
Let us know about it.
Does this product have an incorrect or missing image?
Send us a new image.
Is this product missing categories?
Add more categories.
Review This Product
No reviews yet - be the first to create one!