. A text-book of bacteriology, including the etiology and prevention of infective diseases and a short account of yeasts, and moulds, haematazoa, and psorosperms. Bacteriology. TUBERCULOSIS. 377 The giant cells, which are more or less central, have been described as sending off processes, which, by dividing and subdividing, and. Fici. 162.âPeimary Tubercle of Lung two to theee weeks old, x 50: «, Portion of wall of a branch of the pulmonary artery ; ^,Z/, giant cella with concentric arrangement of fibrous tissue ; c, centre of tubercle beginning to caseate ; ri, small branch of pulmonary arte
. A text-book of bacteriology, including the etiology and prevention of infective diseases and a short account of yeasts, and moulds, haematazoa, and psorosperms. Bacteriology. TUBERCULOSIS. 377 The giant cells, which are more or less central, have been described as sending off processes, which, by dividing and subdividing, and. Fici. 162.âPeimary Tubercle of Lung two to theee weeks old, x 50: «, Portion of wall of a branch of the pulmonary artery ; ^,Z/, giant cella with concentric arrangement of fibrous tissue ; c, centre of tubercle beginning to caseate ; ri, small branch of pulmonary artery seen on transverse section ; ^â , injected capillaries of the alveolar walls (Hamilton'). interlacing, form a reticulum, or meshwork. Towards the peripliery of the tubercle the reticulum may become arranged in the form of a capsule as the age of the tubercle advances, and the reticular giant cell becomes eventually converted into fibrous tissue. The bacillus has disappeared, and the tubercle has healed. Giant cells cannot be relied upon to indicate tuberculosis. They are not always present in tiibercu- losis, and they are not peculiar to tubercle, being found, for example, in actinomycosis. The only certain indication of tuberculosis is the pre- sence of the tubercle bacillus, which. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Crookshank, Edgar M. (Edgar March), 1858-1928. Philadelphia, W. B. Saunders
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